fix(jest): adjust jest dependency version

chore(rollup): remove annotate pure functions

Remove unneeded pure function annotation plugin.

re: #642

fix(parsetorgb): fixes support for variable length floats

Addresses an issue introduced in 4.2.1 that broke colors with values of various float lengths.

fix #610

chore(parsergb): fix support for percentage based opacity

chore(hsl/rgb): update space-separated color tests

chore(github actions): remove node 12 from GH Action

chore(jest): pin version

chore(regex): port regex fixes from 4.1.3

refactor(out.log): remove extraneous log file

build(build): rebuild for release