Changelog:
- Feature: 'Migrate MathType plugins suite from TravisCI to Github
Actions'.
Migrate test build machine from TravisCI to Github
- Add workflow based on 'moodle-plugin-ci'.
- Exclude phpunit test execution on Moodle3_10+.
- Remove TravisCI script from the project.
- Update .gitignore with custom paths.
- Update CHANGELOG
- See: https://github.com/moodlehq/moodle-plugin-ci
- Fix lint issues on privacy class.
- Add full matrix to the tests
- Lint code on tests.
- Add Moodle .env variables.