- Fix a bug which allowed users to create multiple tenants
- Fix Sentry KIWI-TCMS-H2 <https://sentry.io/organizations/kiwitcms/issues/2584184445>
- Fix issues discovered by newest pylint
- Don't allow user to create multiple tenants if they refresh the page, e.g. after a 504 response. Instead redirect them to previously existing tenant
- Migrate from Travis CI to GitHub Actions
- Improvements of tests & CI