Refactor docs

Author: wooorm

readme.md

@@ -39,7 +39,7 @@ It’s small and protects against prototype pollution.
 ## Install
 
 This package is [ESM only][esm].
-In Node.js (version 14.14+ and 16.0+), install with [npm][]:
+In Node.js (version 16+), install with [npm][]:
 
 ```sh
 npm install mdast-util-definitions
@@ -62,8 +62,8 @@ In browsers with [`esm.sh`][esmsh]:
 ## Use
 
 ```js
-import {fromMarkdown} from 'mdast-util-from-markdown'
 import {definitions} from 'mdast-util-definitions'
+import {fromMarkdown} from 'mdast-util-from-markdown'
 
 const tree = fromMarkdown('[example]: https://example.com "Example"')
 
@@ -118,10 +118,13 @@ It exports the additional type  [`GetDefinition`][api-getdefinition].
 
 ## 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,
+`mdast-util-definitions@^6`, compatible with Node.js 12.
 
 ## Security
 
@@ -162,9 +165,9 @@ abide by its terms.
 
 [downloads]: https://www.npmjs.com/package/mdast-util-definitions
 
-[size-badge]: https://img.shields.io/bundlephobia/minzip/mdast-util-definitions.svg
+[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=mdast-util-definitions
 
-[size]: https://bundlephobia.com/result?p=mdast-util-definitions
+[size]: https://bundlejs.com/?q=mdast-util-definitions
 
 [sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg