chore(build): travis stages for specific branches

[cdcabrera]

What's included

• chore(build): travis stages for specific branches
• chore(build): workflow for commits, deprecated set-env

Notes

• Coordinates CI against GitHub PR workflow. Once the GitHub workflows merge into master Travis will be limited to branch pushes only. This focuses Travis build stages to specific branches in order to avoid duplicated effort handled by GitHub workflows, and potentially unnecessary cycles since deploys are already branch specific.
• Replace deprecated env var "set" for GitHub workflow

How to test

• Confirm Travis stages have fired correctly for this PR. They should be
  • Test
  • Beta Deploy

Example

...

Updates issue/story

Ongoing, #275

[codecov-io]

Codecov Report

Merging #448 into ci will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##               ci     #448   +/-   ##
=======================================
  Coverage   93.04%   93.04%           
=======================================
  Files          70       70           
  Lines        2201     2201           
  Branches      705      705           
=======================================
  Hits         2048     2048           
  Misses        136      136           
  Partials       17       17           

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