Update solc

our contracts still use an older version, but I guess it is good to have
the latest solc package

package-lock.json

@@ -1716,6 +1716,12 @@
         "delayed-stream": "~1.0.0"
       }
     },
+    "command-exists": {
+      "version": "1.2.9",
+      "resolved": "https://registry.npmjs.org/command-exists/-/command-exists-1.2.9.tgz",
+      "integrity": "sha512-LTQ/SGc+s0Xc0Fu5WaKnR0YiygZkm9eKFvyS+fRsU7/ZWFF8ykFM6Pc9aCVf1+xasOOZpO3BAVgVrKvsqKHV7w==",
+      "dev": true
+    },
     "commander": {
       "version": "2.20.3",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
@@ -6550,9 +6556,9 @@
       "dev": true
     },
     "require-from-string": {
-      "version": "1.2.1",
+      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-1.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
-      "integrity": "sha1-UpyczvJzgK3+yaL5ZbZJu+5jZBg=",
+      "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
       "dev": true
     },
     "require-main-filename": {
@@ -6976,39 +6982,38 @@
       }
     },
     "solc": {
-      "version": "0.4.26",
+      "version": "0.6.8",
-      "resolved": "https://registry.npmjs.org/solc/-/solc-0.4.26.tgz",
+      "resolved": "https://registry.npmjs.org/solc/-/solc-0.6.8.tgz",
-      "integrity": "sha512-o+c6FpkiHd+HPjmjEVpQgH7fqZ14tJpXhho+/bQXlXbliLIS/xjXb42Vxh+qQY1WCSTMQ0+a5vR9vi0MfhU6mA==",
+      "integrity": "sha512-7URBAisWVjO7dwWNpEkQ5dpRSpSF4Wm0aD5EB82D5BQKh+q7jhOxhgkG4K5gax/geM0kPZUAxnaLcgl2ZXBgMQ==",
       "dev": true,
       "requires": {
+        "command-exists": "^1.2.8",
+        "commander": "3.0.2",
         "fs-extra": "^0.30.0",
+        "js-sha3": "0.8.0",
         "memorystream": "^0.3.1",
-        "require-from-string": "^1.1.0",
+        "require-from-string": "^2.0.0",
-        "semver": "^5.3.0",
+        "semver": "^5.5.0",
-        "yargs": "^4.7.1"
+        "tmp": "0.0.33"
       },
       "dependencies": {
-        "yargs": {
+        "commander": {
-          "version": "4.8.1",
+          "version": "3.0.2",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-3.0.2.tgz",
-          "integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
+          "integrity": "sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==",
-          "dev": true,
+          "dev": true
-          "requires": {
+        },
-            "cliui": "^3.2.0",
+        "js-sha3": {
-            "decamelize": "^1.1.1",
+          "version": "0.8.0",
-            "get-caller-file": "^1.0.1",
+          "resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.8.0.tgz",
-            "lodash.assign": "^4.0.3",
+          "integrity": "sha512-gF1cRrHhIzNfToc802P800N8PpXS+evLLXfsVpowqmAFR9uwbi89WvXg2QspOmXL8QL86J4T1EpFu+yUkwJY3Q==",
-            "os-locale": "^1.4.0",
+          "dev": true
-            "read-pkg-up": "^1.0.1",
+        },
-            "require-directory": "^2.1.1",
+        "semver": {
-            "require-main-filename": "^1.0.1",
+          "version": "5.7.1",
-            "set-blocking": "^2.0.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
-            "string-width": "^1.0.1",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
-            "which-module": "^1.0.0",
+          "dev": true
-            "window-size": "^0.2.0",
-            "y18n": "^3.2.1",
-            "yargs-parser": "^2.4.1"
-          }
         }
       }
     },
@@ -8081,6 +8086,12 @@
             "util-deprecate": "~1.0.1"
           }
         },
+        "require-from-string": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-1.2.1.tgz",
+          "integrity": "sha1-UpyczvJzgK3+yaL5ZbZJu+5jZBg=",
+          "dev": true
+        },
         "string_decoder": {
           "version": "1.1.1",
           "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
@@ -8134,6 +8145,43 @@
             "tape": "^4.4.0",
             "xhr": "^2.2.0",
             "xtend": "^4.0.1"
+          },
+          "dependencies": {
+            "solc": {
+              "version": "0.4.26",
+              "resolved": "https://registry.npmjs.org/solc/-/solc-0.4.26.tgz",
+              "integrity": "sha512-o+c6FpkiHd+HPjmjEVpQgH7fqZ14tJpXhho+/bQXlXbliLIS/xjXb42Vxh+qQY1WCSTMQ0+a5vR9vi0MfhU6mA==",
+              "dev": true,
+              "requires": {
+                "fs-extra": "^0.30.0",
+                "memorystream": "^0.3.1",
+                "require-from-string": "^1.1.0",
+                "semver": "^5.3.0",
+                "yargs": "^4.7.1"
+              }
+            }
+          }
+        },
+        "yargs": {
+          "version": "4.8.1",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
+          "integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
+          "dev": true,
+          "requires": {
+            "cliui": "^3.2.0",
+            "decamelize": "^1.1.1",
+            "get-caller-file": "^1.0.1",
+            "lodash.assign": "^4.0.3",
+            "os-locale": "^1.4.0",
+            "read-pkg-up": "^1.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^1.0.1",
+            "set-blocking": "^2.0.0",
+            "string-width": "^1.0.1",
+            "which-module": "^1.0.0",
+            "window-size": "^0.2.0",
+            "y18n": "^3.2.1",
+            "yargs-parser": "^2.4.1"
           }
         }
       }

package.json

@@ -53,7 +53,7 @@
     "eth-provider": "^0.2.5",
     "homedir": "^0.6.0",
     "promptly": "^3.0.3",
-    "solc": "^0.4.26",
+    "solc": "^0.6.8",
     "solhint": "^2.3.1",
     "truffle-hdwallet-provider": "^1.0.17",
     "truffle-hdwallet-provider-privkey": "^0.3.0",