Migrate from TravisCI to GitHub Actions

[wimpyprogrammer]

No description provided.

[codecov]

Codecov Report

Merging #11 (c8b30f1) into develop (43593ba) will increase coverage by 0.31%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop      #11      +/-   ##
===========================================
+ Coverage    99.21%   99.52%   +0.31%     
===========================================
  Files           22       22              
  Lines          383      424      +41     
  Branches        60       68       +8     
===========================================
+ Hits           380      422      +42     
  Misses           2        2              
+ Partials         1        0       -1     

Impacted Files	Coverage Δ
src/pattern.ts	100.00% <0.00%> (ø)
src/Expander.ts	100.00% <0.00%> (ø)
src/Expansion.ts	100.00% <0.00%> (ø)
src/helpers/iterate-sorted.ts	100.00% <0.00%> (ø)
src/expanders/group-pattern.ts	100.00% <0.00%> (ø)
src/types/regexp-tree-guards.ts	100.00% <0.00%> (ø)
src/expanders/repetition-pattern.ts	100.00% <0.00%> (ø)
src/expanders/alternative-pattern.ts	100.00% <0.00%> (ø)
src/expanders/character-class-pattern.ts	100.00% <0.00%> (ø)
src/transforms/meta-to-char-class-transform.ts	100.00% <0.00%> (ø)
... and 4 more

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