Now that we have PHPUnit set up and some integration tests created, we need these to be automatically run during pull requests, commits, merges, etc...

Merge these into something usable.

• https://deliciousbrains.com/deploying-wordpress-plugins-travis/
• https://github.com/deliciousbrains/wp-plugin-build
• https://github.com/kevindees/travis-ci-wordpress/
• https://medium.com/@nihon_rafy/how-to-mock-static-methods-for-unit-tests-in-php-18b2a11458d0
• https://carlalexander.ca/continuous-integration-wordpress/