diff --git a/.eslintrc.js b/.eslintrc.js
index 6ce9b5d..0fdd421 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,7 +1,7 @@
 module.exports = {
   root: true,
   parserOptions: {
-    ecmaVersion: 2017,
+    ecmaVersion: 2018,
     sourceType: 'module'
   },
   globals: {
@@ -41,7 +41,15 @@ module.exports = {
       env: {
         browser: false,
         node: true
-      }
+      },
+      plugins: ['node'],
+      rules: Object.assign({}, require('eslint-plugin-node').configs.recommended.rules, {
+        // add your custom rules and overrides for node files here
+
+        // this can be removed once the following is fixed
+        // https://github.com/mysticatea/eslint-plugin-node/issues/77
+        'node/no-unpublished-require': 'off'
+      })
     }
   ]
 };
diff --git a/.travis.yml b/.travis.yml
index 5fdde2f..eda3f73 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,9 +23,6 @@ env:
     # See https://git.io/vdao3 for details.
     - JOBS=1
 
-before_install:
-  - npm config set spin false
-
 script:
   - npm run lint:hbs
   - npm run lint:js
diff --git a/config/environment.js b/config/environment.js
index ecf913b..1004b33 100644
--- a/config/environment.js
+++ b/config/environment.js
@@ -12,7 +12,7 @@ module.exports = function(environment) {
     EmberENV: {
       FEATURES: {
         // Here you can enable experimental features on an ember canary build
-        // e.g. 'with-controller': true
+        // e.g. EMBER_NATIVE_DECORATOR_SUPPORT: true
       },
       EXTEND_PROTOTYPES: {
         // Prevent Ember Data from overriding Date.parse.
diff --git a/package-lock.json b/package-lock.json
index 09749b9..6c444ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1108,44 +1108,64 @@
       }
     },
     "@ember/jquery": {
-      "version": "0.5.2",
-      "resolved": "https://registry.npmjs.org/@ember/jquery/-/jquery-0.5.2.tgz",
-      "integrity": "sha1-/jEsA62gAi+gktI/fNfi6wN0tTo=",
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/@ember/jquery/-/jquery-0.6.1.tgz",
+      "integrity": "sha512-XMgfUYag97YOYLsC0Ys4/H6mHO2U2wra/92eVIug+5eYBloYSDhv2MY/iq/ocwXVSB2dQaphJx5pFXqdrjEzWQ==",
       "dev": true,
       "requires": {
-        "broccoli-funnel": "^2.0.1",
-        "ember-cli-babel": "^6.6.0",
-        "jquery": "^3.3.1",
-        "resolve": "^1.7.1"
+        "broccoli-funnel": "^2.0.2",
+        "broccoli-merge-trees": "^3.0.2",
+        "ember-cli-babel": "^7.7.3",
+        "ember-cli-version-checker": "^3.1.3",
+        "jquery": "^3.4.1",
+        "resolve": "^1.11.1"
       },
       "dependencies": {
-        "ember-cli-babel": {
-          "version": "6.18.0",
-          "resolved": "https://registry.npmjs.org/ember-cli-babel/-/ember-cli-babel-6.18.0.tgz",
-          "integrity": "sha512-7ceC8joNYxY2wES16iIBlbPSxwKDBhYwC8drU3ZEvuPDMwVv1KzxCNu1fvxyFEBWhwaRNTUxSCsEVoTd9nosGA==",
+        "broccoli-merge-trees": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/broccoli-merge-trees/-/broccoli-merge-trees-3.0.2.tgz",
+          "integrity": "sha512-ZyPAwrOdlCddduFbsMyyFzJUrvW6b04pMvDiAQZrCwghlvgowJDY+EfoXn+eR1RRA5nmGHJ+B68T63VnpRiT1A==",
           "dev": true,
           "requires": {
-            "amd-name-resolver": "1.2.0",
-            "babel-plugin-debug-macros": "^0.2.0-beta.6",
-            "babel-plugin-ember-modules-api-polyfill": "^2.6.0",
-            "babel-plugin-transform-es2015-modules-amd": "^6.24.0",
-            "babel-polyfill": "^6.26.0",
-            "babel-preset-env": "^1.7.0",
-            "broccoli-babel-transpiler": "^6.5.0",
-            "broccoli-debug": "^0.6.4",
-            "broccoli-funnel": "^2.0.0",
-            "broccoli-source": "^1.1.0",
-            "clone": "^2.0.0",
-            "ember-cli-version-checker": "^2.1.2",
-            "semver": "^5.5.0"
+            "broccoli-plugin": "^1.3.0",
+            "merge-trees": "^2.0.0"
+          }
+        },
+        "ember-cli-version-checker": {
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/ember-cli-version-checker/-/ember-cli-version-checker-3.1.3.tgz",
+          "integrity": "sha512-PZNSvpzwWgv68hcXxyjREpj3WWb81A7rtYNQq1lLEgrWIchF8ApKJjWP3NBpHjaatwILkZAV8klair5WFlXAKg==",
+          "dev": true,
+          "requires": {
+            "resolve-package-path": "^1.2.6",
+            "semver": "^5.6.0"
+          }
+        },
+        "merge-trees": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/merge-trees/-/merge-trees-2.0.0.tgz",
+          "integrity": "sha512-5xBbmqYBalWqmhYm51XlohhkmVOua3VAUrrWh8t9iOkaLpS6ifqm/UVuUjQCeDVJ9Vx3g2l6ihfkbLSTeKsHbw==",
+          "dev": true,
+          "requires": {
+            "fs-updater": "^1.0.4",
+            "heimdalljs": "^0.2.5"
+          }
+        },
+        "resolve": {
+          "version": "1.11.1",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.11.1.tgz",
+          "integrity": "sha512-vIpgF6wfuJOZI7KKKSP+HmiKggadPQAdsp5HiC1mvqnfp0gF1vdwgBWZIdrVft9pgqoMFQN+R7BSWZiBxx+BBw==",
+          "dev": true,
+          "requires": {
+            "path-parse": "^1.0.6"
           }
         }
       }
     },
     "@ember/optional-features": {
-      "version": "0.6.4",
-      "resolved": "https://registry.npmjs.org/@ember/optional-features/-/optional-features-0.6.4.tgz",
-      "integrity": "sha512-nKmKxMk+Q/BGE8cmfq8KTHnYHVgrU3GHhy/eZ/OTj/fUvzXZhxaEVFOfAXssiOzV3FOQDJjznpbua2TEtHaQRw==",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/@ember/optional-features/-/optional-features-0.7.0.tgz",
+      "integrity": "sha512-qLXvL/Kq/COb43oQmCrKx7Fy8k1XJDI2RlgbCnZHH26AGVgJT/sZugx1A2AIxKdamtl/Mi+rQSjGIuscSjqjDw==",
       "dev": true,
       "requires": {
         "chalk": "^2.3.0",
@@ -1190,38 +1210,17 @@
       }
     },
     "@ember/test-helpers": {
-      "version": "0.7.27",
-      "resolved": "https://registry.npmjs.org/@ember/test-helpers/-/test-helpers-0.7.27.tgz",
-      "integrity": "sha512-AQESk0FTFxRY6GyZ8PharR4SC7Fju0rXqNkfNYIntAjzefZ8xEqEM4iXDj5h7gAvfx/8dA69AQ9+p7ubc+KvJg==",
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@ember/test-helpers/-/test-helpers-1.6.0.tgz",
+      "integrity": "sha512-t6K15t4p/iW1D7rUAfGZZwIWqLV8HoVm9Dxn44L9PwMFjw3GAJf4bHdwCbdr3jpsgjG14HH+5XzF9IBIvmOZ4A==",
       "dev": true,
       "requires": {
-        "broccoli-funnel": "^2.0.1",
-        "ember-assign-polyfill": "~2.4.0",
-        "ember-cli-babel": "^6.12.0",
-        "ember-cli-htmlbars-inline-precompile": "^1.0.0"
-      },
-      "dependencies": {
-        "ember-cli-babel": {
-          "version": "6.18.0",
-          "resolved": "https://registry.npmjs.org/ember-cli-babel/-/ember-cli-babel-6.18.0.tgz",
-          "integrity": "sha512-7ceC8joNYxY2wES16iIBlbPSxwKDBhYwC8drU3ZEvuPDMwVv1KzxCNu1fvxyFEBWhwaRNTUxSCsEVoTd9nosGA==",
-          "dev": true,
-          "requires": {
-            "amd-name-resolver": "1.2.0",
-            "babel-plugin-debug-macros": "^0.2.0-beta.6",
-            "babel-plugin-ember-modules-api-polyfill": "^2.6.0",
-            "babel-plugin-transform-es2015-modules-amd": "^6.24.0",
-            "babel-polyfill": "^6.26.0",
-            "babel-preset-env": "^1.7.0",
-            "broccoli-babel-transpiler": "^6.5.0",
-            "broccoli-debug": "^0.6.4",
-            "broccoli-funnel": "^2.0.0",
-            "broccoli-source": "^1.1.0",
-            "clone": "^2.0.0",
-            "ember-cli-version-checker": "^2.1.2",
-            "semver": "^5.5.0"
-          }
-        }
+        "broccoli-debug": "^0.6.5",
+        "broccoli-funnel": "^2.0.2",
+        "ember-assign-polyfill": "^2.6.0",
+        "ember-cli-babel": "^7.7.3",
+        "ember-cli-htmlbars-inline-precompile": "^2.1.0",
+        "ember-test-waiters": "^1.0.0"
       }
     },
     "@embroider/core": {
@@ -1679,13 +1678,30 @@
       "dev": true
     },
     "accepts": {
-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
-      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
       "dev": true,
       "requires": {
-        "mime-types": "~2.1.18",
-        "negotiator": "0.6.1"
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      },
+      "dependencies": {
+        "mime-db": {
+          "version": "1.40.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
+          "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA==",
+          "dev": true
+        },
+        "mime-types": {
+          "version": "2.1.24",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.24.tgz",
+          "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
+          "dev": true,
+          "requires": {
+            "mime-db": "1.40.0"
+          }
+        }
       }
     },
     "acorn": {
@@ -1719,21 +1735,10 @@
       }
     },
     "acorn-jsx": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
-      "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
-      "dev": true,
-      "requires": {
-        "acorn": "^3.0.4"
-      },
-      "dependencies": {
-        "acorn": {
-          "version": "3.3.0",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
-          "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo=",
-          "dev": true
-        }
-      }
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
+      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
+      "dev": true
     },
     "acorn-node": {
       "version": "1.7.0",
@@ -1774,15 +1779,15 @@
       "dev": true
     },
     "ajv": {
-      "version": "5.5.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
-      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+      "version": "6.10.2",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+      "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
       "dev": true,
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
+        "fast-deep-equal": "^2.0.1",
         "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
       }
     },
     "ajv-errors": {
@@ -1791,12 +1796,6 @@
       "integrity": "sha512-DCRfO/4nQ+89p/RK43i8Ezd41EqdGIU4ld7nGF8OQ14oc/we5rEntLCUa7+jrn3nn83BosfwZA0wb4pon2o8iQ==",
       "dev": true
     },
-    "ajv-keywords": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-2.1.1.tgz",
-      "integrity": "sha1-YXmX/F9gV2iUxDX5QNgZ4TW4B2I=",
-      "dev": true
-    },
     "amd-name-resolver": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/amd-name-resolver/-/amd-name-resolver-1.2.0.tgz",
@@ -1818,6 +1817,12 @@
       "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ==",
       "dev": true
     },
+    "ansi-html": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/ansi-html/-/ansi-html-0.0.7.tgz",
+      "integrity": "sha1-gTWEAhliqenm/QOflA0S9WynhZ4=",
+      "dev": true
+    },
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
@@ -2056,6 +2061,12 @@
       "integrity": "sha1-ECyenpAF0+fjgpvwxPok7oYu6bk=",
       "dev": true
     },
+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+      "dev": true
+    },
     "async": {
       "version": "2.6.2",
       "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
@@ -2388,9 +2399,9 @@
       }
     },
     "babel-plugin-htmlbars-inline-precompile": {
-      "version": "0.2.6",
-      "resolved": "https://registry.npmjs.org/babel-plugin-htmlbars-inline-precompile/-/babel-plugin-htmlbars-inline-precompile-0.2.6.tgz",
-      "integrity": "sha512-H4H75TKGUFij8ukwEYWEERAgrUf16R8NSK1uDPe3QwxT8mnE1K8+/s6DVjUqbM5Pv6lSIcE4XufXdlSX+DTB6g==",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-htmlbars-inline-precompile/-/babel-plugin-htmlbars-inline-precompile-1.0.0.tgz",
+      "integrity": "sha512-4jvKEHR1bAX03hBDZ94IXsYCj3bwk9vYsn6ux6JZNL2U5pvzCWjqyrGahfsGNrhERyxw8IqcirOi9Q6WCo3dkQ==",
       "dev": true
     },
     "babel-plugin-module-resolver": {
@@ -3119,9 +3130,9 @@
       }
     },
     "bluebird": {
-      "version": "3.5.4",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.4.tgz",
-      "integrity": "sha512-FG+nFEZChJrbQ9tIccIfZJBz3J7mLrAhxakAbnrJWn8d7aKOC+LWifa0G+p4ZqKp4y13T7juYvdhq9NzKdsrjw==",
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
+      "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==",
       "dev": true
     },
     "bn.js": {
@@ -3161,36 +3172,46 @@
       }
     },
     "body-parser": {
-      "version": "1.18.3",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.3.tgz",
-      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
       "dev": true,
       "requires": {
-        "bytes": "3.0.0",
+        "bytes": "3.1.0",
         "content-type": "~1.0.4",
         "debug": "2.6.9",
         "depd": "~1.1.2",
-        "http-errors": "~1.6.3",
-        "iconv-lite": "0.4.23",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
         "on-finished": "~2.3.0",
-        "qs": "6.5.2",
-        "raw-body": "2.3.3",
-        "type-is": "~1.6.16"
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
       },
       "dependencies": {
-        "iconv-lite": {
-          "version": "0.4.23",
-          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
-          "integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
+        "bytes": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+          "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==",
+          "dev": true
+        },
+        "http-errors": {
+          "version": "1.7.2",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.7.2.tgz",
+          "integrity": "sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==",
           "dev": true,
           "requires": {
-            "safer-buffer": ">= 2.1.2 < 3"
+            "depd": "~1.1.2",
+            "inherits": "2.0.3",
+            "setprototypeof": "1.1.1",
+            "statuses": ">= 1.5.0 < 2",
+            "toidentifier": "1.0.0"
           }
         },
-        "qs": {
-          "version": "6.5.2",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
+        "setprototypeof": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+          "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==",
           "dev": true
         }
       }
@@ -3338,12 +3359,12 @@
       }
     },
     "broccoli-asset-rev": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/broccoli-asset-rev/-/broccoli-asset-rev-2.7.0.tgz",
-      "integrity": "sha512-GZ7gU3Qo6HMAUqDeh1q+4UVCQPJPjCyGcpIY5s9Qp58a244FT4nZSiy8qYkVC4LLIWTZt59G7jFFsUcj/13IPQ==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/broccoli-asset-rev/-/broccoli-asset-rev-3.0.0.tgz",
+      "integrity": "sha512-gAHQZnwvtl74tGevUqGuWoyOdJUdMMv0TjGSMzbdyGImr9fZcnM6xmggDA8bUawrMto9NFi00ZtNUgA4dQiUBw==",
       "dev": true,
       "requires": {
-        "broccoli-asset-rewrite": "^1.1.0",
+        "broccoli-asset-rewrite": "^2.0.0",
         "broccoli-filter": "^1.2.2",
         "broccoli-persistent-filter": "^1.4.3",
         "json-stable-stringify": "^1.0.0",
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-          }
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
+            "ansi-regex": "^4.1.0"
           }
         }
       }
@@ -20134,13 +16036,13 @@
       "dev": true
     },
     "tar": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
-      "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.2.tgz",
+      "integrity": "sha512-FCEhQ/4rE1zYv9rYXJw/msRqsnmlje5jHP6huWeBZ704jUTy02c5AZyWujpMR1ax6mVw9NyJMfuK2CMDWVIfgA==",
       "dev": true,
       "requires": {
         "block-stream": "*",
-        "fstream": "^1.0.2",
+        "fstream": "^1.0.12",
         "inherits": "2"
       }
     },
@@ -20306,15 +16208,16 @@
       }
     },
     "testem": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/testem/-/testem-2.14.0.tgz",
-      "integrity": "sha512-tldpNPCzXfibmxOoTMGOfr8ztUiHf9292zSXCu7SitBx9dCK83k7vEoa77qJBS9t3RGCQCRF+GNMUuiFw//Mbw==",
+      "version": "2.17.0",
+      "resolved": "https://registry.npmjs.org/testem/-/testem-2.17.0.tgz",
+      "integrity": "sha512-PLkIlT523w5rTJPWwR4TL1EiAEa941ECV7d4pMqsB0YdnH+sCTz0loWMKCUSdhR+VijveAZ6anE/JHehE7KqMQ==",
       "dev": true,
       "requires": {
         "backbone": "^1.1.2",
         "bluebird": "^3.4.6",
         "charm": "^1.0.0",
         "commander": "^2.6.0",
+        "compression": "^1.7.4",
         "consolidate": "^0.15.1",
         "execa": "^1.0.0",
         "express": "^4.10.7",
@@ -20364,23 +16267,6 @@
       "integrity": "sha512-qftQXnX1DzpSV8EddtHIT0eDDEiBF8ywhFYR2lI9xrGtxqKN+CvLXhACeCIGbCpQfxxERbrkZEFb8cZcDKbVZA==",
       "dev": true
     },
-    "three-way-merger": {
-      "version": "0.5.7",
-      "resolved": "https://registry.npmjs.org/three-way-merger/-/three-way-merger-0.5.7.tgz",
-      "integrity": "sha512-aD2nvGowCgJxoH49Izou5uR4PLCuH2yiw6+BJPg0H7RCLzpLy/4J9onM9sPXetmsq/AVfZ8fEyf8lbGKxKPrcA==",
-      "dev": true,
-      "requires": {
-        "semver": "^6.0.0"
-      },
-      "dependencies": {
-        "semver": {
-          "version": "6.0.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-6.0.0.tgz",
-          "integrity": "sha512-0UewU+9rFapKFnlbirLi3byoOuhrSsli/z/ihNnvM24vgF+8sNBiI1LZPBSH9wJKUwaUbw+s3hToDLCXkrghrQ==",
-          "dev": true
-        }
-      }
-    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
@@ -20427,9 +16313,9 @@
           }
         },
         "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
           "dev": true
         }
       }
@@ -20509,6 +16395,12 @@
         "repeat-string": "^1.6.1"
       }
     },
+    "toidentifier": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
+      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==",
+      "dev": true
+    },
     "tough-cookie": {
       "version": "2.4.3",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
@@ -20628,13 +16520,30 @@
       }
     },
     "type-is": {
-      "version": "1.6.16",
-      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
-      "integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
       "dev": true,
       "requires": {
         "media-typer": "0.3.0",
-        "mime-types": "~2.1.18"
+        "mime-types": "~2.1.24"
+      },
+      "dependencies": {
+        "mime-db": {
+          "version": "1.40.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
+          "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA==",
+          "dev": true
+        },
+        "mime-types": {
+          "version": "2.1.24",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.24.tgz",
+          "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
+          "dev": true,
+          "requires": {
+            "mime-db": "1.40.0"
+          }
+        }
       }
     },
     "typedarray": {
@@ -20738,38 +16647,15 @@
       "dev": true
     },
     "union-value": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
-      "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
       "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
         "is-extendable": "^0.1.1",
-        "set-value": "^0.4.3"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "set-value": {
-          "version": "0.4.3",
-          "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
-          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
-          "dev": true,
-          "requires": {
-            "extend-shallow": "^2.0.1",
-            "is-extendable": "^0.1.1",
-            "is-plain-object": "^2.0.1",
-            "to-object-path": "^0.3.0"
-          }
-        }
+        "set-value": "^2.0.1"
       }
     },
     "unique-by": {
@@ -21068,9 +16954,9 @@
       },
       "dependencies": {
         "rsvp": {
-          "version": "4.8.4",
-          "resolved": "https://registry.npmjs.org/rsvp/-/rsvp-4.8.4.tgz",
-          "integrity": "sha512-6FomvYPfs+Jy9TfXmBpBuMWNH94SgCsZmJKcanySzgNNP6LjWxBvyLTa9KaMfDDM5oxRfrKDB0r/qeRsLwnBfA==",
+          "version": "4.8.5",
+          "resolved": "https://registry.npmjs.org/rsvp/-/rsvp-4.8.5.tgz",
+          "integrity": "sha512-nfMOlASu9OnRJo1mbEk2cz0D56a1MBNrJ7orjRZQG10XDyuvwksKbuXNp6qa+kbn839HwjwhBzhFmdsaEAfauA==",
           "dev": true
         }
       }
@@ -21203,12 +17089,13 @@
       }
     },
     "websocket-driver": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.0.tgz",
-      "integrity": "sha1-DK+dLXVdk67gSdS90NP+LMoqJOs=",
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.3.tgz",
+      "integrity": "sha512-bpxWlvbbB459Mlipc5GBzzZwhoZgGEZLuqPaR0INBGnPAY1vdBX6hPnoFXiw+3yWxDuHyQjO2oXTMyS8A5haFg==",
       "dev": true,
       "requires": {
-        "http-parser-js": ">=0.4.0",
+        "http-parser-js": ">=0.4.0 <0.4.11",
+        "safe-buffer": ">=5.1.0",
         "websocket-extensions": ">=0.1.1"
       }
     },
@@ -21331,18 +17218,18 @@
       "dev": true
     },
     "write": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
       "dev": true,
       "requires": {
         "mkdirp": "^0.5.1"
       }
     },
     "write-file-atomic": {
-      "version": "2.4.2",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.2.tgz",
-      "integrity": "sha512-s0b6vB3xIVRLWywa6X9TOMA7k9zio0TMOsl9ZnDkliA/cfJlpHXAscj0gbHVJiTdIuAYpIyqS5GW91fqm6gG5g==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.11",
diff --git a/package.json b/package.json
index ef0b4ab..c1bfdb6 100644
--- a/package.json
+++ b/package.json
@@ -24,46 +24,46 @@
     "deploy": "git push 5apps master"
   },
   "devDependencies": {
-    "@ember/jquery": "^0.5.2",
-    "@ember/optional-features": "^0.6.3",
+    "@ember/jquery": "^0.6.0",
+    "@ember/optional-features": "^0.7.0",
     "babel-preset-es2015": "^6.22.0",
     "babelify": "^7.3.0",
     "brfs": "^2.0.2",
-    "broccoli-asset-rev": "^2.7.0",
-    "ember-ajax": "^4.0.1",
+    "broccoli-asset-rev": "^3.0.0",
+    "ember-ajax": "^5.0.0",
     "ember-auto-import": "^1.5.2",
     "ember-awesome-macros": "0.41.0",
-    "ember-cli": "~3.8.1",
+    "ember-cli": "~3.10.1",
     "ember-cli-app-version": "^3.2.0",
-    "ember-cli-babel": "^7.1.2",
+    "ember-cli-babel": "^7.7.3",
     "ember-cli-chart": "^3.4.0",
     "ember-cli-dependency-checker": "^3.1.0",
-    "ember-cli-eslint": "^4.2.3",
-    "ember-cli-htmlbars": "^3.0.0",
-    "ember-cli-htmlbars-inline-precompile": "^1.0.3",
+    "ember-cli-eslint": "^5.1.0",
+    "ember-cli-htmlbars": "^3.0.1",
+    "ember-cli-htmlbars-inline-precompile": "^2.1.0",
     "ember-cli-inject-live-reload": "^1.8.2",
     "ember-cli-sass": "^7.2.0",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.1",
     "ember-cli-uglify": "^2.1.0",
-    "ember-cli-update": "^0.21.2",
     "ember-export-application-global": "^2.0.0",
     "ember-flatpickr": "^2.14.0",
-    "ember-load-initializers": "^1.1.0",
+    "ember-load-initializers": "^2.0.0",
     "ember-macro-helpers": "0.17.0",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-promise-helpers": "1.0.6",
-    "ember-qunit": "^3.4.1",
+    "ember-qunit": "^4.4.1",
     "ember-resolver": "^5.0.1",
-    "ember-source": "~3.8.0",
+    "ember-source": "~3.10.0",
     "ember-truth-helpers": "github:jmurphyau/ember-truth-helpers#31a14373a31f1f82c77537720549b47a95c28e5f",
-    "eslint-plugin-ember": "^5.2.0",
+    "eslint-plugin-ember": "^6.2.0",
+    "eslint-plugin-node": "^9.0.1",
     "ethers": "^4.0.27",
     "kosmos-schemas": "^2.0.0",
     "kredits-contracts": "^5.4.0",
     "loader.js": "^4.7.0",
     "ndjson": "github:hugomrdias/ndjson#feat/readable-stream3",
-    "qunit-dom": "^0.8.0",
+    "qunit-dom": "^0.8.4",
     "transform-loader": "^0.2.4",
     "tv4": "^1.3.0"
   },
diff --git a/tests/integration/components/user-avatar/component-test.js b/tests/integration/components/user-avatar/component-test.js
index fbcbedd..1275f21 100644
--- a/tests/integration/components/user-avatar/component-test.js
+++ b/tests/integration/components/user-avatar/component-test.js
@@ -11,7 +11,7 @@ module('Integration | Component | user-avatar', function(hooks) {
     this.set('bumi', contributors.findBy('id', '1'));
     await render(hbs`{{user-avatar contributor=bumi}}`);
 
-    assert.equal(this.element.textContent.trim(), '');
+    assert.dom(this.element).hasText('');
   });
 
   test('default image source URL', async function(assert) {
diff --git a/tests/unit/utils/group-by-test.js b/tests/unit/utils/group-by-test.js
index 9ab5b0e..e7e6b12 100644
--- a/tests/unit/utils/group-by-test.js
+++ b/tests/unit/utils/group-by-test.js
@@ -5,37 +5,37 @@ import { A } from '@ember/array';
 import { module, test } from 'qunit';
 import groupBy from 'kredits-web/utils/group-by';
 
-module('Unit | Utils | group-by');
+module('Unit | Utils | group-by', function () {
+  let car1 = { name: 'Carrera', color: 'red' };
+  let car2 = { name: 'Veyron', color: 'red' };
+  let car3 = { name: 'Corvette', color: 'blue' };
+  let car4 = { name: 'Viper', color: 'blue' };
+  let car5 = { name: 'Cobra', color: 'green' };
+  let cars = A([car1, car2, car3, car4, car5]);
 
-let car1 = { name: 'Carrera', color: 'red' };
-let car2 = { name: 'Veyron', color: 'red' };
-let car3 = { name: 'Corvette', color: 'blue' };
-let car4 = { name: 'Viper', color: 'blue' };
-let car5 = { name: 'Cobra', color: 'green' };
-let cars = A([car1, car2, car3, car4, car5]);
+  test('it groups cars by color', function (assert) {
+    assert.expect(1);
+    let redGroup = { property: 'color', value: 'red', items: [car1, car2] };
+    let blueGroup = { property: 'color', value: 'blue', items: [car3, car4] };
+    let greenGroup = { property: 'color', value: 'green', items: [car5] };
 
-test('it groups cars by color', function(assert) {
-  assert.expect(1);
-  let redGroup = { property: 'color', value: 'red', items: [car1, car2] };
-  let blueGroup = { property: 'color', value: 'blue', items: [car3, car4] };
-  let greenGroup = { property: 'color', value: 'green', items: [car5] };
+    let result = groupBy(cars, 'color');
+    let expected = [redGroup, blueGroup, greenGroup];
 
-  let result = groupBy(cars, 'color');
-  let expected = [redGroup, blueGroup, greenGroup];
+    assert.deepEqual(result, expected);
+  });
 
-  assert.deepEqual(result, expected);
-});
-
-test('it does not fail with empty array', function(assert) {
-  let cars = [];
-
-  let result = groupBy(cars, 'color');
-  assert.deepEqual(result, []);
-});
-
-test('it does not failkwith null', function(assert) {
-  let cars = null;
-
-  let result = groupBy(cars, 'color');
-  assert.deepEqual(result, []);
+  test('it does not fail with empty array', function (assert) {
+    let cars = [];
+
+    let result = groupBy(cars, 'color');
+    assert.deepEqual(result, []);
+  });
+
+  test('it does not failkwith null', function (assert) {
+    let cars = null;
+
+    let result = groupBy(cars, 'color');
+    assert.deepEqual(result, []);
+  });
 });