Bump resolve-url-loader 2.3.1 -> 3.1.2

Author: wendorf

package.json

@@ -17,7 +17,7 @@
         "laravel-mix": "^5.0.0",
         "lodash": "^4.17.19",
         "popper.js": "^1.12",
-        "resolve-url-loader": "^2.3.1",
+        "resolve-url-loader": "^3.1.2",
         "sass": "^1.15.2",
         "sass-loader": "^7.1.0",
         "vue": "^2.5.17"