All CI tests currently run in TravisCI are ported to GitHub Actions except for the BrowserStack tests.
TravisCI is kept in place for some transition period until we know GitHub Actions are working as expected. Also tests run on BrowserStack must be migrated to GitHub Actions before.
* fs-extra dependency of in-repo-addon was not listed explicitly
* refactor: inclusion of api in build for readability
* fix: 'readdirSync' is assigned a value but never used
