Update eslint-loader to the latest version 🚀 (#287)

* chore(package): update eslint-loader to version 4.0.0

* chore(package): update lockfile package-lock.json

Co-authored-by: greenkeeper[bot] <23040076+greenkeeper[bot]@users.noreply.github.com>
Co-authored-by: Vittorio Guerriero <[email protected]>

Author: greenkeeper[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "conventional-changelog-cli": "^2.0.31",
     "copy-webpack-plugin": "^5.1.1",
     "eslint": "^6.8.0",
-    "eslint-loader": "^3.0.3",
+    "eslint-loader": "^4.0.0",
     "eslint-plugin-import": "^2.20.2",
     "git-branch-is": "^3.1.0",
     "husky": "^4.2.3",