feat!: publish as ESM only, ditch ipjs for dual publish

[rvagg]

BREAKING CHANGE

This will impact users that are trying to use this from a CJS project. Sorry, but it's getting too hard to juggle both worlds and typescript and all the various bundler challenges.

[socket-security[bot]]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@types/mocha	10.0.1	None	+0	96.3 kB	types

🚮 Removed packages: ipjs@5.2.0

[rvagg]

Published as cborg@3.0.0-alpha.1 if people would like to help test this before I publish properly and mark as latest.

[rvagg]

merged manually