Update docs

package.json

@@ -1,7 +1,7 @@
 {
   "name": "html-encodings",
   "version": "3.0.0",
-  "description": "List of known HTML character encoding labels",
+  "description": "Info on HTML character encodings",
   "license": "MIT",
   "keywords": [
     "html",

readme.md

@@ -5,19 +5,57 @@
 [![Downloads][downloads-badge]][downloads]
 [![Size][size-badge]][size]
 
-Info on known HTML character encodings labels, from the [spec][].
+Info on HTML character encodings.
 
-## Install
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`list`](#list)
+    *   [`groups`](#groups)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package contains info on HTML character encoding labels.
+These are defined by the [Encoding spec][spec].
 
-This package is ESM only: Node 12+ is needed to use it and it must be `import`ed
-instead of `require`d.
+## When should I use this?
+
+Maybe when you’re writing an HTML parser, minifier, or formatter, otherwise
+probably never!
+
+## Install
 
-[npm][]:
+This package is [ESM only][esm].
+In Node.js (version 12.20+, 14.14+, or 16.0+), install with [npm][]:
 
 ```sh
 npm install html-encodings
 ```
 
+In Deno with [Skypack][]:
+
+```js
+import * as htmlEncodings from 'https://cdn.skypack.dev/html-encodings@3?dts'
+```
+
+In browsers with [Skypack][]:
+
+```html
+<script type="module">
+  import * as htmlEncodings from 'https://cdn.skypack.dev/html-encodings@3?min'
+</script>
+```
+
 ## Use
 
 ```js
@@ -66,10 +104,29 @@ List of all encodings (`Array<string>`).
 Map of group labels to lists of synonymous encodings
 (`Record<string, Array<string>>`).
 
+## Types
+
+This package is fully typed with [TypeScript][].
+
+## Compatibility
+
+This package is at least compatible with all maintained versions of Node.js.
+As of now, that is Node.js 12.20+, 14.14+, and 16.0+.
+It also works in Deno and modern browsers.
+
+## Security
+
+This package is safe.
+
 ## Related
 
-*   [`html-dangerous-encodings`](https://github.com/wooorm/html-dangerous-encodings)
-    — List of dangerous HTML character encoding labels
+*   [`wooorm/html-dangerous-encodings`](https://github.com/wooorm/html-dangerous-encodings)
+    — list of dangerous HTML character encoding labels
+
+## Contribute
+
+Yes please!
+See [How to Contribute to Open Source][contribute].
 
 ## License
 
@@ -95,8 +152,16 @@ Map of group labels to lists of synonymous encodings
 
 [npm]: https://docs.npmjs.com/cli/install
 
+[skypack]: https://www.skypack.dev
+
 [license]: license
 
 [author]: https://wooorm.com
 
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[typescript]: https://www.typescriptlang.org
+
+[contribute]: https://opensource.guide/how-to-contribute/
+
 [spec]: https://encoding.spec.whatwg.org/#names-and-labels