Replace Ava by Vitest

[skarab42]

Motivation: #175

• Reduce the time of the tests by half.
• No need to copy fixtures folder to dist folder.
• Watch mode and coverage.

[tommy-mitchell]

Would this allow to build in watch mode, too?

[skarab42]

Would this allow to build in watch mode, too?

Yes, but it need a small modification for the chmod, I'll do that tomorrow.

[sindresorhus]

I think this should have been discussed in an issue first.

[sindresorhus]

Using ts-node could probably have achieved the same thing in a few lines of code without rewriting everything.

[sindresorhus]

My concern with switching test runner is that most test runners do too much, which means a lot of bugs. I personally saw this when Jest became popular. It solved a lot of real use-cases true, but it also caused a lot of annoyance by being super buggy. I generally prefer simplicity. However, this is not my repo, so I'm not the one you have to convince.

[skarab42]

I think this should have been discussed in an issue first.

It's not a big deal, I had fun doing it, do what you want with it ;)