test(github): add github CI

[srod]

No description provided.

[codecov]

Codecov Report

Merging #902 into develop will decrease coverage by 5.68%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #902      +/-   ##
===========================================
- Coverage    96.57%   90.88%   -5.69%     
===========================================
  Files           22       22              
  Lines          409      417       +8     
  Branches       102      103       +1     
===========================================
- Hits           395      379      -16     
- Misses          10       16       +6     
- Partials         4       22      +18

Flag	Coverage Δ
#unittests	90.88% <ø> (?)

Impacted Files	Coverage Δ
packages/cli/src/cli.js	80.64% <0%> (-19.36%)	⬇️
packages/utils/src/utils.js	68.33% <0%> (-11.33%)	⬇️
packages/cssnano/src/cssnano.js	90% <0%> (-10%)	⬇️
packages/core/src/compress.js	84% <0%> (-8%)	⬇️
packages/terser/src/terser.js	92.3% <0%> (-7.7%)	⬇️
packages/uglify-js/src/uglify-js.js	92.3% <0%> (-7.7%)	⬇️
packages/uglify-es/src/uglify-es.js	93.33% <0%> (-6.67%)	⬇️
packages/babel-minify/src/babel-minify.js	93.75% <0%> (-6.25%)	⬇️
packages/yui/src/yui.js	93.75% <0%> (-6.25%)	⬇️
packages/core/src/core.js	94.73% <0%> (-5.27%)	⬇️
... and 4 more

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