chore(package): update eslint-loader to version 4.0.1

Closes #46

Author: greenkeeper[bot]

package.json

@@ -82,7 +82,7 @@
     "eslint": "^6.2.1",
     "eslint-config-prettier": "^6.1.0",
     "eslint-friendly-formatter": "^4.0.1",
-    "eslint-loader": "^3.0.0",
+    "eslint-loader": "^4.0.1",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-prettier": "^3.1.0",
     "friendly-errors-webpack-plugin": "^1.7.0",