Feature release 2.3.0

New features:
- add translations to XLIFF
- add schema management
- add feature to chose own widget template
- add set unique as default at create
- add register at filter pass
- add check for unsupportet combinations of variant woth is-unique

Fixes:
- any fixes for PCHCQ
- fix template
- fix migration (table exist)

Hotfix release 2.2.1

- Merge translations

Stable release 2.2.0

This brings full Contao 4.9 support.

Additionally there have been performance improvements
and various bugfixes.

- Slug generator for special characters
- Option to prevent "id-" prefix for numbers

Bugfix release 2.1.3

Switch to github-actions.

Hotfix release 2.1.2

- Updated translations from transifex.

Hotfix release 2.1.1

- Hotfix save empty string as null

Stable release 2.1.0

This brings full Contao 4 support.

Additionally there have been performance improvements
and various bugfixes.

Hotfix release 2.0.6

- Correct php header

Build cosmetics