v0.4.1: TypeScript support, legacy builds

The main new feature of this release is Typescript support, added in this Herculean PR by @MysteryBlokHed and reviewed by @jgerigmeyer.

Other new features and changes:

• deltaPhi contrast method now supported, thanks to a PR by @Myndex
• Node v12 and somewhat older browsers are now supported, through separate .legacy builds, thanks to a PR by @jgerigmeyer
• The premultiplied option is now supported in mix(), thanks to a PR by @redneb
• Support both number and percent in (ok)lab and (ok)lch lightness. Serialize as number, per spec.
• Lab-D65 is now serialized as lab-d65() and not lab().

All merged pull requests

• [contrast / deltaPhi] by @Myndex in #209
• Fix missing import by @Myndex in #210
• Add Carbon by @sayzlim in #211
• Fix some typos in contrast docs by @xi in #216
• Contrast docs by @svgeesus in #214
• Add Babel with support for Node v12. by @jgerigmeyer in #215
• Update z-index by @mixalistzikas in #222
• [types] Add type definitions from DefinitelyTyped/DefinitelyTyped#62510 by @MysteryBlokHed in #221
• support the premultiplied option in mix by @redneb in #219
• [spaces] Lab,LCH,Oklab,Oklch lightness is number or percent. Fix #225 by @svgeesus in #227
• [tests] correct an XYZ test, now passes by @svgeesus in #229

New Contributors

• @Myndex made their first contribution in #209
• @sayzlim made their first contribution in #211
• @xi made their first contribution in #216
• @jgerigmeyer made their first contribution in #215
• @mixalistzikas made their first contribution in #222
• @MysteryBlokHed made their first contribution in #221
• @redneb made their first contribution in #219

Full Changelog: v0.4.0...v0.4.1