* Move fixtures' expected outputs to the fixture directories

This makes them easier to diff with conventional tools.

* Tweak code a bit

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Co-authored-by: Jordan Pittman <[email protected]>

* Add compatibility with `prettier-plugin-multiline-arrays`

* Update changelog

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Co-authored-by: Jordan Pittman <[email protected]>

* Add cache for known plugins

We have to call `require.resolve(…)` ~10 times per call to `parse(…)`. These calls generally take microseconds however if you call `prettier.format(…)` several thousand times the times add up. It also adds up for embedded documents which call `parse(…)` a large number of times.

This adds a cache for these calls because generally only a few will ever be installed and Node.js will not cache misses internally.

* Update src/plugins.ts

Co-authored-by: Robin Malfait <[email protected]>

* Update changelog

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Co-authored-by: Robin Malfait <[email protected]>

* Handle async design system in v4 alpha 19

* Update changelog