Replace cosmiconfig with lilconfig

[TrySound]

It's already replaced in postcss-load-config

See https://github.com/postcss/postcss-load-config/blob/main/package.json#L26

[adamwathan]

Hey sorry any chance you could rebase this to resolve the conflicts? Then can definitely merge 👍🏻 Thank you!

[TrySound]

Hey, will rebase in a couple of hours! Btw having more ideas how to improve install size.

[TrySound]

Done

[bradlc]

Hey @TrySound, thanks for updating the PR! What's the reason for updating the postcss version in package.json?

[thecrypticace]

it probably happened automatically and wasn't noticed. NPM is doing the same thing for me any time I npm install a new dependency into the tailwindcss repo. I have absolutely no idea why.

[TrySound]

yeah, npm does a bad job with lockfiles. Yarn and pnpm are more stable.

[bradlc]

Ah I see, all good 👍 Thanks again!

[MichaelDeBoey]

@adamwathan @bradlc This would be a breaking change, as files without an extension are now handled differently
https://github.com/antonk52/lilconfig#difference-to-cosmiconfig

[TrySound]

postcss-load-config migrated in 3.1.

[MichaelDeBoey]

@TrySound They provide the yaml loaders themselves instead, so for them it's not breaking at all

Since we don't do that in this PR, it's a breaking change for Tailwind