(Some) nonstandard color spaces error when round-tripping

[LeaVerou]

This is a blocker for v0.5.0 as it's a pretty serious regression Turns out this exists in v0.4.3 too 🤦🏽‍♀️

Try this in the console:

new Color(new Color("red").to("p3-linear").toString())

[LeaVerou]

I think we should parse both forms in v0.5.0 to ease the transition, and just print out a warning when using unprefixed ids for nonstandard spaces.

Otherwise it's a breaking change, and a pretty significant one at that.

[lloydk]

I don't think this is a regression but a case of missing formats. I tested the 0.45 and 0.43 releases and had the same problem.

I created a PR for the missing formats #435.

[LeaVerou]

Thanks for working on this @lloydk! I left a comment in the PR, but if this issue is present in the previous release as well, then it's not a blocker.

[jgerigmeyer]

I proposed a slightly larger fix for this in #439.