use ESM fork of unitbezier

[birkskyum]

While working on ESM support ( #1595 (comment) ) , i stumbled upon mapbox/unitbezier.

This small library is js + type definitions, uses tape for testing, and is published as cjs.

The project is done - it hasn't needed any changes for years, but to resolve esm we either have to 1. make a PR and wait for that process, 2. onboard and publish, or 3. just inline it with modernization - since it could be useful to more people i made a small esm/ts fork package

Launch Checklist

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Post benchmark scores.
• Add an entry to CHANGELOG.md under the ## main section.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​birkskyum/​unitbezier@​1.0.3

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[HarelM]

Can we try and open PRs for the relevant repos? Some did the migration lately I believe, and I would like to try it out before splitting the ecosystem...

[birkskyum]

I'd prefer not to invest too much time in mapbox's/other's mostly abandoned repos at this point.

[HarelM]

If we wrap the code ourselfs into ESM, does it matter if the dependencies are ESM or not?