1.23.1

Upgrade Kimai - Install Kimai - Docker

PHP Version compatibility:

• PHP 7.3 is end-of-life: you need to update now
• PHP 7.4, PHP 8 and PHP 8.1 are supported

Enhancements

• fix unit test failing on month borders (#3494)
• Prevent invoice template update (#3493)

Fixed bugs

• bump version 1.23.1 (#3499)

Thanks to all contributors ❤️

Involved in this release: @kevinpapst