Use yarn and updated dependencies

* Default to use yarn instead of npm
* Fixed eslintignore (do not lint hidden files)
* Replaced deprecated eslint-loader with eslint-webpack-plugin
* Use current eslint (v7) and upgraded vue plugin
* Set node to 12, as 11 is not supported anymore (12 is the LTS version)
* TODO: Drop package-lock.json as soon as we do not use npm anymore

.eslintignore

@@ -5,3 +5,4 @@
 /.quasar
 /node_modules
 /src-ssr
+.*

README.md

@@ -4,7 +4,7 @@ Dynamischen Managementsystem für Studentenclubs
 
 ## Install the dependencies
 ```bash
-npm install
+yarn install
 ```
 
 ## Plugins
@@ -29,17 +29,17 @@ The order of the plugins is importend!
 
 ### Start the app in development mode (hot-code reloading, error reporting, etc.)
 ```bash
-quasar dev
+yarn quasar dev
 ```
 
 ### Lint the files
 ```bash
-npm run lint
+yarn run lint
 ```
 
 ### Build the app for production
 ```bash
-quasar build
+yarn quasar build
 ```
 <!--
 ### Customize the configuration

package.json

@@ -10,27 +10,27 @@
     "test": "echo \"No test specified\" && exit 0"
   },
   "dependencies": {
+    "@dreamonkey/vue-routes-flattener": "^0.1.0",
     "@quasar/extras": "^1.9.10",
-    "@types/crypto-js": "^4.0.1",
     "@vue/composition-api": "^0.6.4",
-    "axios": "^0.18.1",
+    "axios": "^0.21.0",
     "core-js": "^3.7.0",
-    "quasar": "^1.14.3",
+    "quasar": "^1.14.5",
     "vue-router": "3.3.2"
   },
   "devDependencies": {
-    "@quasar/app": "^2.1.6",
-    "@types/node": "^10.17.44",
+    "@quasar/app": "^2.1.8",
+    "@types/node": "^12.19.6",
     "@types/webpack": "^4.41.25",
-    "@types/webpack-env": "^1.15.3",
-    "@typescript-eslint/eslint-plugin": "^3.3.0",
-    "@typescript-eslint/parser": "^3.3.0",
-    "babel-eslint": "^10.0.1",
-    "eslint": "^6.8.0",
+    "@types/webpack-env": "^1.16.0",
+    "@typescript-eslint/eslint-plugin": "^4.8.2",
+    "@typescript-eslint/parser": "^4.8.2",
+    "babel-eslint": "^10.1.0",
+    "eslint": "^7.14.0",
     "eslint-config-prettier": "^6.15.0",
-    "eslint-loader": "^3.0.3",
-    "eslint-plugin-vue": "^6.1.2",
-    "typescript": "^4.0.5"
+    "eslint-plugin-vue": "^7.1.0",
+    "eslint-webpack-plugin": "^2.4.0",
+    "typescript": "^4.1.2"
   },
   "browserslist": [
     "last 10 Chrome versions",
@@ -43,7 +43,7 @@
     "last 6 iOS versions"
   ],
   "engines": {
-    "node": ">= 11.0.0",
+    "node": ">= 12.0.0",
     "npm": ">= 6.13.4",
     "yarn": ">= 1.21.1"
   }

quasar.conf.js

@@ -67,12 +67,11 @@ module.exports = configure(function(ctx) {
       extendWebpack(cfg) {
         // linting is slow in TS projects, we execute it only for production builds
         if (ctx.prod) {
-          cfg.module.rules.push({
-            enforce: 'pre',
-            test: /\.(js|vue)$/,
-            loader: 'eslint-loader',
-            exclude: /node_modules/
-          });
+          const ESLintPlugin = require('eslint-webpack-plugin');
+
+          cfg.plugins.push(new ESLintPlugin({
+            extensions: ['ts']
+          }));
         }
       }
     },