form-data
### What? Dropping `form-data` polyfill as Node.js 18+ versions all expose it on `globalThis` ### Why? Reduce the amount of shipped code in Next.js ### How? Similar to #56899 See: https://nodejs.org/docs/latest-v18.x/api/globals.html#class-formdata
Enables type checking for tests in CI and fixes a bunch of things related to that