replace travis with GH actions

[kylemh]

⚙️

[codecov-io]

Codecov Report

Merging #367 (c6679fb) into master (dd70720) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #367   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          124       158   +34     
  Branches        16        23    +7     
=========================================
+ Hits           124       158   +34     

Impacted Files	Coverage Δ
src/messages.js	100.00% <0.00%> (ø)
src/format-files.js	100.00% <0.00%> (ø)
src/uncaught-exception-handler.js	100.00% <0.00%> (ø)

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[github-actions]

🎉 This PR is included in version 5.0.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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