Reduce library size

[unional]

colormap is great but including arraytools and clone make the library quite large (total to ~200k not minified using webpack. Minified along with rollup would be smaller).

I created color-map which create the color range same as your inner loop without dependency.

It is (1k minified, was 10k not minified using webpack). Do you want to use it inside your library?

[bpostlethwaite]

Yep absolutely. @dfcreative will probably address this in an upcoming version. No reason for this module to be stupidly huge.

[bpostlethwaite]

solved in #15