Random color generation

[omgovich]

Many GH projects use random colors for their purposes, so it makes sense for us to add this tiny API.

In contrast to other libraries, our random is tree-shakeable.

[codecov-commenter]

Codecov Report

Merging #38 (1e50f61) into master (60847a6) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #38   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        33    +1     
  Lines          395       399    +4     
  Branches        84        84           
=========================================
+ Hits           395       399    +4     

Impacted Files	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)
src/random.ts	100.00% <100.00%> (ø)

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[github-actions[bot]]

Size Change: +29 B (0%)

Total Size: 8.39 kB

Filename	Size	Change
./dist/index.js	1.81 kB	+29 B (+2%)

ℹ️ View Unchanged

| Filename | Size | Change | | :--- | :---: | :---: | | `./dist/plugins/a11y.js` | 456 B | 0 B | | `./dist/plugins/hwb.js` | 613 B | 0 B | | `./dist/plugins/lab.js` | 1.03 kB | 0 B | | `./dist/plugins/lch.js` | 1.33 kB | 0 B | | `./dist/plugins/mix.js` | 960 B | 0 B | | `./dist/plugins/names.js` | 1.36 kB | 0 B | | `./dist/plugins/xyz.js` | 830 B | 0 B |

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