Update dependencies

Dance the update dance with me.

package.json

@@ -8,7 +8,6 @@
   },
   "scripts": {
     "install-all": "./scripts/every-app.sh \"npm install\"",
-    "postshrinkwrap": "node scripts/fix-package-lock.js &>/dev/null || true",
     "build-json": "npm run compile-contracts && node ./scripts/build-json.js",
     "repl": "truffle exec scripts/repl.js",
     "seeds": "truffle exec scripts/seeds.js",
@@ -43,22 +42,22 @@
   "homepage": "https://github.com/67P/truffle-kredits#readme",
   "devDependencies": {
     "@aragon/kits-base": "^1.0.0",
-    "@aragon/os": "^4.2.0",
+    "@aragon/os": "^4.3.0",
     "async-each-series": "^1.1.0",
     "cli-table": "^0.3.1",
-    "eslint": "^5.16.0",
-    "eslint-plugin-import": "^2.17.3",
-    "eslint-plugin-node": "^8.0.1",
-    "eslint-plugin-promise": "^4.1.1",
-    "eth-provider": "^0.2.2",
+    "eslint": "^6.8.0",
+    "eslint-plugin-import": "^2.20.1",
+    "eslint-plugin-node": "^11.0.0",
+    "eslint-plugin-promise": "^4.2.1",
+    "eth-provider": "^0.2.5",
     "promptly": "^3.0.3",
     "solc": "^0.4.26",
-    "solhint": "^2.1.0",
+    "solhint": "^2.3.0",
     "yargs": "^12.0.0"
   },
   "dependencies": {
-    "ethers": "^4.0.29",
-    "ipfs-http-client": "^30.1.3",
+    "ipfs-http-client": "^41.0.1",
+    "ethers": "^4.0.44",
     "kosmos-schemas": "^2.1.0",
     "node-fetch": "^2.6.0",
     "tv4": "^1.3.0"