Support modern CSS notations of RGB, HSL and LCH color functions

[omgovich]

Closes #32 Closes #33 Closes #34

[codecov-commenter]

Codecov Report

Merging #35 (9b85818) into master (cc61f53) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #35   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines          372       375    +3     
  Branches        79        82    +3     
=========================================
+ Hits           372       375    +3     

Impacted Files	Coverage Δ
src/colorModels/hslString.ts	100.00% <100.00%> (ø)
src/colorModels/lchString.ts	100.00% <100.00%> (ø)
src/colorModels/rgbString.ts	100.00% <100.00%> (ø)

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[github-actions[bot]]

Size Change: +73 B (+1%)

Total Size: 6.91 kB

Filename	Size	Change
./dist/index.js	1.78 kB	+54 B (+3%)
./dist/plugins/lch.js	1.16 kB	+19 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` | 875 B | 0 B | | `./dist/plugins/names.js` | 1.36 kB | 0 B | | `./dist/plugins/xyz.js` | 668 B | 0 B |

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