Remove travis, add github actions for CI

[purplecabbage]

• removed travis badge, and yml
• added github action to run tests, and badge to show when tests are passing

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@28f530d). Click here to learn what that means. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #5   +/-   ##
=========================================
  Coverage          ?   66.56%           
=========================================
  Files             ?        6           
  Lines             ?      341           
  Branches          ?       62           
=========================================
  Hits              ?      227           
  Misses            ?      110           
  Partials          ?        4           

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[adobe-bot]

:tada: This PR is included in version 1.0.0 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket: