removed meaningless eslint-loader error by doing some walkaround.

vuejs/vue-cli#4231

Author: hulululuh

package.json

@@ -13,6 +13,7 @@
     "test:unit": "vue-cli-service test:unit"
   },
   "main": "background.js",
+  "resolutions": { "eslint-loader": "2.1.2" },
   "dependencies": {
     "@tweenjs/tween.js": "^18.6.0",
     "adm-zip": "^0.4.16",

yarn.lock

@@ -1504,7 +1504,7 @@
   integrity sha512-3a9rVpOKPQsDgAlRkhmBMHboGobivG/47BbQGE66Z8YJxrgF/AWikP3Jy67SmxtszRkyiWfw4aJFRV9r3MzffQ==
   dependencies:
     "@vue/cli-shared-utils" "^4.4.6"
-    eslint-loader "^2.2.1"
+    eslint-loader "^2.1.2"
     globby "^9.2.0"
     inquirer "^7.1.0"
     webpack "^4.0.0"
@@ -4580,10 +4580,10 @@ eslint-config-prettier@^3.3.0:
   dependencies:
     get-stdin "^6.0.0"
 
-eslint-loader@^2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/eslint-loader/-/eslint-loader-2.2.1.tgz#28b9c12da54057af0845e2a6112701a2f6bf8337"
-  integrity sha512-RLgV9hoCVsMLvOxCuNjdqOrUqIj9oJg8hF44vzJaYqsAHuY9G2YAeN3joQ9nxP0p5Th9iFSIpKo+SD8KISxXRg==
+eslint-loader@2.1.2, eslint-loader@^2.2.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/eslint-loader/-/eslint-loader-2.1.2.tgz#453542a1230d6ffac90e4e7cb9cadba9d851be68"
+  integrity sha512-rA9XiXEOilLYPOIInvVH5S/hYfyTPyxag6DZhoQOduM+3TkghAEQ3VcFO8VnX4J4qg/UIBzp72aOf/xvYmpmsg==
   dependencies:
     loader-fs-cache "^1.0.0"
     loader-utils "^1.0.2"