Release v0.22.0 · antfu/vite-plugin-md

this is the first version which I feel very confident in saying that not only is it Vite 4 compatible (the last version was too) but many of the problematic downstream deps which CJS only have been switch to ESM
this was a bit painful for me (@yankeeinlondon ) but I imagine for others too which I appologize for
I had hoped the pretty good test coverages would prevent the types of problems we've had recently but in this painful transition to ESM only Javascript I was only testing the source code and it was passing 100% of the time but the transpiled code wasn't always working as it should have
in this release -- and all going forward -- a release can not be made without all functional tests passing but also:
- tsc tests - meaning that we run tsc --noEmit to capture any type errors that "tsc" finds (which is more than just eslint)
- node tests - meaning we actually run the transpiled javascript to be sure there are no errors
I expect most of these changes will eliminate most of the problems folks have experienced over the past month or two
Fortunely for the Javascript universe, projects like Vite are moving folks to ESM at an increasing pace and we'll all be better off when there's only a single module system

Last but not least:

because the popular -- but old -- gray-matter package was making async calls to node functions as well as having really old deps of it's own that are undoubtedly gathering dust and possibly security issues ... I refactored it.
you will notice that we now depend on @yankeeinlondon/gray-matter instead of gray-matter. I refactored gray-matter 6 months ago to ESM and put in a pull request but got no response so yesterday I refactored it to Typescript. There are some generous uses of any but the type system is fully generated rather than hand crafted as it was before.
all original tests were refactored to use vitest instead of mocha
all of the tests pass with two exceptions which I looked at without full context of the internals and the current results actually looked reasonable to me so I've just added the skip keyword for now
ultimately I do hope that the gray-matter folks eventually accept my PR but until they do I'll work off this TS/ESM fork

Please note: though I term these "major changes" there are no intended breaking changes to the API

Fixed stray typing errors related to migration of some types to builder-api package - by @yankeeinlondon (be51a)

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