Travis still fails silently sometimes

[Zlatkovsky]

Example (where proceeded and thought that all was well, despite failing with exit code 1!)

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Done in 0.81s.
The command "yarn build || travis_terminate 1" exited with 0.

https://travis-ci.com/OfficeDev/script-lab/jobs/183240572#L768