v3.1.0

What's Changed

• Interface fixes and php8 recommendations by @Johannestegner in #59
• Support for interim numbers. by @Johannestegner in #61
• Updated phpunit xml to use correct cache path by @Johannestegner in #62
• GetDate function by @Johannestegner in #63

Full Changelog: v3.0.5...v3.1.0