Support PHP 8.1, bump minimum to 7.3
What's Changed
- Support PHP 8.1, bump minimum to 7.3 by @francislavoie in #4
- Switch to Github Actions, drop Travis CI
- Bump minimum PHP version to 7.3
- Enable support for 8.x
- Remove dependency on
vectorface/cache, it was just using a test helper file. Just copied it over instead. - Use PHPUnit v9, adjust tests to match
Full Changelog: v0.2.1...v0.2.2