We're following Calendar Versioning with generous backwards-compatibility guarantees. Therefore, we only support the latest version.
That said, you shouldn't be afraid to upgrade if you only use our documented public APIs and pay attention to DeprecationWarning
s.
Whenever there is a need to break compatibility, it is announced in the changelog and raises a DeprecationWarning
for a year (if possible) before it's finally really broken.
If you think you found a vulnerability, please use GitHub's security advisory form, or email Hynek Schlawack at [email protected].