Change the categories of vue/no-arrow-functions-in-watch rule to 'vue3-essential' and 'essential'. (#1156)

Author: ota-meshi

Diff for: docs/rules/README.md

@@ -38,6 +38,7 @@ Enforce all the rules in this category, as well as all higher priority rules, wi
 
 | Rule ID | Description |    |
 |:--------|:------------|:---|
+| [vue/no-arrow-functions-in-watch](./no-arrow-functions-in-watch.md) | disallow using arrow functions to define watcher |  |
 | [vue/no-async-in-computed-properties](./no-async-in-computed-properties.md) | disallow asynchronous actions in computed properties |  |
 | [vue/no-deprecated-data-object-declaration](./no-deprecated-data-object-declaration.md) | disallow using deprecated object declaration on data (in Vue.js 3.0.0+) | :wrench: |
 | [vue/no-deprecated-dollar-listeners-api](./no-deprecated-dollar-listeners-api.md) | disallow using deprecated `$listeners` (in Vue.js 3.0.0+) |  |
@@ -159,6 +160,7 @@ Enforce all the rules in this category, as well as all higher priority rules, wi
 
 | Rule ID | Description |    |
 |:--------|:------------|:---|
+| [vue/no-arrow-functions-in-watch](./no-arrow-functions-in-watch.md) | disallow using arrow functions to define watcher |  |
 | [vue/no-async-in-computed-properties](./no-async-in-computed-properties.md) | disallow asynchronous actions in computed properties |  |
 | [vue/no-custom-modifiers-on-v-model](./no-custom-modifiers-on-v-model.md) | disallow custom modifiers on v-model used on the component |  |
 | [vue/no-dupe-keys](./no-dupe-keys.md) | disallow duplication of field names |  |
@@ -286,7 +288,6 @@ For example:
 | [vue/keyword-spacing](./keyword-spacing.md) | enforce consistent spacing before and after keywords | :wrench: |
 | [vue/match-component-file-name](./match-component-file-name.md) | require component name property to match its file name |  |
 | [vue/max-len](./max-len.md) | enforce a maximum line length |  |
-| [vue/no-arrow-functions-in-watch](./no-arrow-functions-in-watch.md)| disallows using arrow functions to define wathcer |  |
 | [vue/no-boolean-default](./no-boolean-default.md) | disallow boolean defaults | :wrench: |
 | [vue/no-duplicate-attr-inheritance](./no-duplicate-attr-inheritance.md) | enforce `inheritAttrs` to be set to `false` when using `v-bind="$attrs"` |  |
 | [vue/no-empty-pattern](./no-empty-pattern.md) | disallow empty destructuring patterns |  |

Diff for: docs/rules/no-arrow-functions-in-watch.md

@@ -2,11 +2,13 @@
 pageClass: rule-details
 sidebarDepth: 0
 title: vue/no-arrow-functions-in-watch
-description: disallow arrow functions to define watcher
+description: disallow using arrow functions to define watcher
 ---
 # vue/no-arrow-functions-in-watch
 > disallow using arrow functions to define watcher
 
+- :gear: This rule is included in all of `"plugin:vue/vue3-essential"`, `"plugin:vue/essential"`, `"plugin:vue/vue3-strongly-recommended"`, `"plugin:vue/strongly-recommended"`, `"plugin:vue/vue3-recommended"` and `"plugin:vue/recommended"`.
+
 ## :book: Rule Details
 
 This rules disallows using arrow functions to defined watcher.The reason is arrow functions bind the parent context, so `this` will not be the Vue instance as you expect.([see here for more details](https://vuejs.org/v2/api/#watch))

Diff for: lib/configs/essential.js

@@ -6,6 +6,7 @@
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
+    'vue/no-arrow-functions-in-watch': 'error',
     'vue/no-async-in-computed-properties': 'error',
     'vue/no-custom-modifiers-on-v-model': 'error',
     'vue/no-dupe-keys': 'error',

Diff for: lib/configs/vue3-essential.js

@@ -6,6 +6,7 @@
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
+    'vue/no-arrow-functions-in-watch': 'error',
     'vue/no-async-in-computed-properties': 'error',
     'vue/no-deprecated-data-object-declaration': 'error',
     'vue/no-deprecated-dollar-listeners-api': 'error',

Diff for: lib/rules/no-arrow-functions-in-watch.js

@@ -10,7 +10,7 @@ module.exports = {
     type: 'problem',
     docs: {
       description: 'disallow using arrow functions to define watcher',
-      categories: undefined,
+      categories: ['vue3-essential', 'essential'],
       url: 'https://eslint.vuejs.org/rules/no-arrow-functions-in-watch.html'
     },
     fixable: null,