fix(deps): update remark (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
remark-gfm	^1 -> ^4.0.0
remark-slug	^6.1.0 -> ^8.0.0

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Release Notes

remarkjs/remark-gfm (remark-gfm)

v4.0.0

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Change

• b8cc334 Update @types/mdast, unified, utilities
  migrate: update too
• 9eb0f54 Change to use exports
  migrate: don’t use private APIs
• 5715c93 Change to require Node.js 16
  migrate: update too

Full Changelog: remarkjs/remark-gfm@3.0.1...4.0.0

v3.0.1

Compare Source

• 97437dc Add improved docs
  by @​wooorm in https://github.com/remarkjs/remark-gfm/pull/25

Full Changelog: remarkjs/remark-gfm@3.0.0...3.0.1

v3.0.0

Compare Source

• 890005e Add support for GFM footnotes ✨
  (if you were using remark-footnotes before, you should remove it!)
  (how footnotes are turned to HTML is done in remark-rehype, please update that too)

Full Changelog: remarkjs/remark-gfm@2.0.0...3.0.0

v2.0.0

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• 6c518d8 Use ESM

  // From CommonJS
  var remarkGfm = require('remark-gfm')
  
  // To ESM
  import remarkGfm from 'remark-gfm'

  Learn more about ESM in this guide
• 37d92ac Add JSDoc based types
• 0846014 Remove warning for remark 12

Full Changelog: remarkjs/remark-gfm@1.0.0...2.0.0

remarkjs/remark-slug (remark-slug)

v8.0.0

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Deprecated 💀

Full Changelog: remarkjs/remark-slug@7.0.1...8.0.0

v7.0.1

Compare Source

• 2aa5d77 Mark remark-slug as legacy
  please use rehype-slug instead

Full Changelog: remarkjs/remark-slug@7.0.0...7.0.1

v7.0.0

Compare Source

• a18ca15 Use ESM

  // From CommonJS
  var remarkSlug = require('remark-slug')
  
  // To ESM
  import remarkSlug from 'remark-slug'

  Learn more about ESM in this guide
• 077d217 Add JSDoc based types

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