Revert "Remove dependency on color lib and upgrade version to 2.1.0"

[mcmire]

This reverts commit d923914.

It seems that the implementation of hueShift is slightly different in this commit than before and therefore produces slightly different colors as before. Reverting so that we can fix this bug.

[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/color@0.11.4	None	+4	78.2 kB	qix

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[socket-security]

👍 Dependency issues cleared. Learn more about Socket for GitHub ↗︎

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

Ignoring: npm/color-string@0.3.0

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[mcmire]

@SocketSecurity ignore npm/color-string@0.3.0

New author is okay, I reviewed his profile and latest contributions on GitHub and he seems trustworthy.

[mcmire]

For posterity, I ran npm run build-demo and compared this commit with the one that I reverted. There is in fact a very minute difference. It's really hard to capture in a screenshot, but it is there.