[kimikage]

Closes #573

This explicitly throws an error when there are not enough candidate colors for the requested number of colors.
Strictly speaking, this is a breaking change, but it is safer than returning invalid colors.

Also, to ensure consistency with the candidates, this explicitly converts the seed to Lab{Float32} before applying transform.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.99%. Comparing base (38fa1b3) to head (b426f9b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #597      +/-   ##
==========================================
+ Coverage   98.84%   98.99%   +0.14%     
==========================================
  Files          10       10              
  Lines        1303     1391      +88     
==========================================
+ Hits         1288     1377      +89     
+ Misses         15       14       -1     

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