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

Closes #6

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "eslint": "^5.16.0",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-config-prettier": "^6.0.0",
-    "eslint-loader": "^2.1.2",
+    "eslint-loader": "^3.0.4",
     "eslint-plugin-import": "^2.18.0",
     "eslint-plugin-jsx-a11y": "^6.2.1",
     "eslint-plugin-prettier": "^3.1.0",