# Release 4.0.0 (November 14, 2021)

- Starting with version 4.0.0, typing_extensions uses Semantic Versioning.
  See the README for more information.
- Dropped support for Python versions 3.5 and older, including Python 2.7.
- Simplified backports for Python 3.6.0 and newer. Patch by Adam Turner (@AA-Turner).

## Added in version 4.0.0

- Runtime support for PEP 673 and `typing_extensions.Self`. Patch by
  James Hilton-Balfe (@Gobot1234).
- Runtime support for PEP 655 and `typing_extensions.Required` and `NotRequired`.
  Patch by David Foster (@davidfstr).

## Removed in version 4.0.0

The following non-exported but non-private names have been removed as they are
unneeded for supporting Python 3.6 and newer.

- TypingMeta
- OLD_GENERICS
- SUBS_TREE
- HAVE_ANNOTATED
- HAVE_PROTOCOLS
- V_co
- VT_co

# Previous releases

Prior to release 4.0.0 we did not provide a changelog. Please check
the Git history for details.
