v0.5.2

• Adds YIQ color space and Kotsarenko/Ramos color difference function (thanks @mourner for the pointer!)
• Adds the weights argument to differenceEuclidean

v0.5.1

Breaking: Removed the culori() function, which was an alias for culori.rgb(). This makes the build simpler and clarifies the API a bit.

Cleaned up the build process; added Prettier, ESLint.