v2.2.0

Features:

• PHP 8 Support (#26, @LKaemmerling)
• Allow counters to be a float (#20, @LKaemmerling)

Improvements:

• Improve Type Hinting and comments (#17, @rdohms)
• Add tests for certain parts (#17, @rdohms)

Within this release, we dramatically improved the code quality, a big thanks goes out to @rdohms.