chore: update exports map in package.json

[SukkaW]

With only import in the package.json exports map, it prevents require('tinyexec') from working even on Node.js 22/23.

This can be fixed by adding require as well, or simply removing imports constraints. The PR implements the latter one.

cc @43081j

[43081j]

ah man what a fool I am! 😂 I think I left import in a few packages 😬

thanks for catching this