chore(package): update eslint-loader to version 3.0.4

Closes #566

Author: greenkeeper[bot]

package.json

@@ -144,7 +144,7 @@
     "css-loader": "^1.0.0",
     "eslint": "^5.2.0",
     "eslint-config-airbnb": "^17.0.0",
-    "eslint-loader": "^2.0.0",
+    "eslint-loader": "^3.0.4",
     "eslint-plugin-import": "^2.17.1",
     "eslint-plugin-jsx-a11y": "^6.0.3",
     "eslint-plugin-react": "^7.2.1",