Refactor docs

Author: wooorm

readme.md

@@ -54,7 +54,7 @@ On the other hand, this is quite powerful and fast enough for many other cases.
 ## Install
 
 This package is [ESM only][esm].
-In Node.js (version 14.14+, 16.0+), install with [npm][]:
+In Node.js (version 16+), install with [npm][]:
 
 ```sh
 npm install unist-util-select
@@ -101,7 +101,8 @@ console.log(selectAll('code ~ :nth-child(even)', tree))
 
 ## API
 
-This package exports the identifiers `matches`, `select`, and `selectAll`.
+This package exports the identifiers [`matches`][api-matches],
+[`select`][api-select], and [`selectAll`][api-select-all].
 There is no default export.
 
 ### `matches(selector, node)`
@@ -280,10 +281,13 @@ It exports no additional types.
 
 ## Compatibility
 
-Projects maintained by the unified collective are compatible with all maintained
+Projects maintained by the unified collective are compatible with maintained
 versions of Node.js.
-As of now, that is Node.js 14.14+ and 16.0+.
-Our projects sometimes work with older versions, but this is not guaranteed.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line, `unist-util-select@^5`,
+compatible with Node.js 12.
 
 ## Related
 
@@ -324,9 +328,9 @@ abide by its terms.
 
 [downloads]: https://www.npmjs.com/package/unist-util-select
 
-[size-badge]: https://img.shields.io/bundlephobia/minzip/unist-util-select.svg
+[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=unist-util-select
 
-[size]: https://bundlephobia.com/result?p=unist-util-select
+[size]: https://bundlejs.com/?q=unist-util-select
 
 [sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
 
@@ -367,3 +371,9 @@ abide by its terms.
 [hast]: https://github.com/syntax-tree/hast
 
 [hast-util-select]: https://github.com/syntax-tree/hast-util-select
+
+[api-matches]: #matchesselector-node
+
+[api-select]: #selectselector-tree
+
+[api-select-all]: #selectallselector-tree