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

Closes #80

Author: greenkeeper[bot]

package.json

@@ -65,7 +65,7 @@
     "eslint": "^5.9.0",
     "eslint-config-guo": "^0.8.0",
     "eslint-friendly-formatter": "^4.0.1",
-    "eslint-loader": "^2.0.0",
+    "eslint-loader": "^3.0.4",
     "eslint-plugin-html": "^4.0.6",
     "eslint-plugin-vue": "^5.0.0",
     "extract-text-webpack-plugin": "^3.0.0",