We follow 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're only using our documented public APIs and pay attention to DeprecationWarnings.
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.
Warning
There are two exception:
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We reserve the right to remove framework integrations at any time without prior notice to ease the maintenance burden. We will try to put them as separate packages on PyPI if we do so.
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APIs may be marked as provisional. They are not guaranteed to be stable and may change or be removed without prior notice.
If you think you found a vulnerability, please use GitHub's security advisory form, or email Hynek Schlawack at hs@ox.cx.