Vue 3 upgrade

.browserslistrc

@@ -0,0 +1,3 @@
+> 1%
+last 2 versions
+not dead

.eslintignore

@@ -1,5 +1,3 @@
 /build/
-/config/
 /dist/
-/*.js
 /test/unit/coverage/

.eslintrc.js

@@ -1,29 +1,17 @@
-// https://eslint.org/docs/user-guide/configuring
-
 module.exports = {
   root: true,
-  parserOptions: {
-    parser: 'babel-eslint'
-  },
   env: {
-    browser: true,
+    node: true
   },
   extends: [
-    // https://github.com/vuejs/eslint-plugin-vue#priority-a-essential-error-prevention
-    // consider switching to `plugin:vue/strongly-recommended` or `plugin:vue/recommended` for stricter rules.
-    'plugin:vue/essential', 
-    // https://github.com/standard/standard/blob/master/docs/RULES-en.md
-    'standard'
-  ],
-  // required to lint *.vue files
-  plugins: [
-    'vue'
+    'plugin:vue/vue3-essential',
+    '@vue/standard'
   ],
-  // add your custom rules here
+  parserOptions: {
+    parser: 'babel-eslint'
+  },
   rules: {
-    // allow async-await
-    'generator-star-spacing': 'off',
-    // allow debugger during development
-    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
+    'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off'
   }
 }

babel.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  presets: [
+    '@vue/cli-plugin-babel/preset'
+  ]
+}