0.6.0

This releases a bunch of built-up changes for newer versions of PHP and support for improved type-safety when following recommended conventions.

What's Changed

• Test on 8.1 and 8.2 by @Firehed in #33
• Support PHP 8.1 & Enums by @Firehed in #22
• Improve type safety of containers w/ tools by @Firehed in #34
• Improve messaging on various errors by @Firehed in #37
• Adopt some readme formatting enhancements and add a couple clarifications by @Firehed in #41
• Test on 8.3 and 8.4-dev by @Firehed in #42

Full Changelog: 0.5.2...0.6.0