chore(package): update eslint-loader to version 3.0.0

Closes #37

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "enzyme-adapter-react-16": "^1.6.0",
     "eslint": "^5.6.1",
     "eslint-config-react-app": "^4.0.0",
-    "eslint-loader": "2.1.2",
+    "eslint-loader": "3.0.0",
     "eslint-plugin-flowtype": "^3.9.1",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^6.1.2",