feat: add deprecation/recommended configuration (#69)

Allows to use simplified `deprecation/recommended` configuration:
```json
{
"extends": [
    "plugin:deprecation/recommended",
  ]
}
```

Closes #68

README.md

@@ -6,57 +6,79 @@
 [![Npm](https://img.shields.io/npm/v/eslint-plugin-deprecation.svg)](https://www.npmjs.com/package/eslint-plugin-deprecation)
 [![Npm Downloads](https://img.shields.io/npm/dt/eslint-plugin-deprecation.svg)](https://www.npmjs.com/package/eslint-plugin-deprecation)
 ![Size](https://badgen.net/bundlephobia/minzip/eslint-plugin-deprecation)
-[![Licence](https://img.shields.io/npm/l/eslint-plugin-deprecation.svg?maxAge=2592000)](https://github.com/gund/eslint-plugin-deprecation/blob/master/LICENSE)
+[![License](https://img.shields.io/npm/l/eslint-plugin-deprecation.svg?maxAge=2592000)](https://github.com/gund/eslint-plugin-deprecation/blob/master/LICENSE)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 
-> ESLint rule that reports usage of deprecated code
+> An [ESLint](https://eslint.org/) rule that reports usage of deprecated code.
 
 ## Prerequisites
 
-This plugin only works with `@typescript-eslint/parser`.
+If you already use [TypeScript](https://www.typescriptlang.org/) and one or more rules from the [`typescript-eslint`](https://typescript-eslint.io/) plugin, then `eslint-plugin-deprecation` will work out of the box without any additional dependencies or special configuration specified in this section. (This is because `@typescript-eslint/plugin` automatically contains `@typescript-eslint/parser` and your ESLint should already be configured with the `parserOptions` to work properly with TypeScript.)
 
-Which means that you should install dev deps:
+Otherwise, in order for you to use this plugin, you must also install the following dependencies:
 
-- `@typescript-eslint/parser`
 - `typescript`
+- `@typescript-eslint/parser`
+
+For example, if you use the `npm` package manager, then you would run the following command in the root of your project:
+
+```sh
+npm install --save-dev typescript @typescript-eslint/parser
+```
 
-Then configure ESLint to parse TypeScript and include type information:
+Next, you must configure ESLint to parse TypeScript and include type information:
 
 ```jsonc
 {
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
     "ecmaVersion": 2020,
     "sourceType": "module",
-    "project": "./tsconfig.json" // <-- Point to your project's tsconfig.json or create new one
+    "project": "./tsconfig.json" // <-- Point to your project's "tsconfig.json" or create a new one.
   }
 }
 ```
 
 ## Install
 
-Install the plugin
+For example, if you use the `npm` package manager, then you would run the following command in the root of your project:
 
-```
-npm i -D eslint-plugin-deprecation
+```sh
+npm install --save-dev eslint-plugin-deprecation
 ```
 
 ## Setup
 
-Now add deprecation plugin and rule to your `.eslintrc`:
+### Using the `recommended` Config
+
+The easiest way to use this plugin is to extend from the `recommended` config, like this:
 
 ```jsonc
 {
-  "plugins": ["deprecation", ...],
-  "rules": {
-    "deprecation/deprecation": "warn", // or "error" to have stricter rule
-    ...
-  }
+  "extends": [
+    "plugin:deprecation/recommended",
+  ],
 }
 ```
 
-Now eslint will report all deprecated code that you use!
+The `recommended` config will enable the plugin and enable the rule with a value of `error`.
+
+### Manually Enable the Plugin and Rule
+
+If you don't want to use the `recommended` config for some reason, you can accomplish the same thing by specifying the following config:
+
+```jsonc
+{
+  "plugins": [
+    "deprecation",
+  ],
+
+  "rules": {
+    "deprecation/deprecation": "error",
+  },
+}
+```
 
----
+## Credits
 
-_NOTE:_ This rule was ported from https://github.com/SonarSource/SonarJS repository.
+This rule was originally ported from [SonarJS repository](https://github.com/SonarSource/SonarJS).

src/configs/index.ts

@@ -0,0 +1,3 @@
+import recommended from './recommended';
+
+export { recommended };

src/configs/recommended.ts

@@ -0,0 +1,8 @@
+const recommended = {
+  plugins: ['deprecation'],
+  rules: {
+    'deprecation/deprecation': 'error',
+  },
+};
+
+export default recommended;

src/index.ts

@@ -1,3 +1,4 @@
 import * as rules from './rules';
+import * as configs from './configs';
 
-export { rules };
+export { configs, rules };