Prepare release 4.6.0 (#177)

Author: JelleZijlstra

CHANGELOG.md

@@ -1,5 +1,7 @@
-# Unreleased
+# Release 4.6.0 (May 22, 2023)
 
+- `typing_extensions` is now documented at
+  https://typing-extensions.readthedocs.io/en/latest/. Patch by Jelle Zijlstra.
 - Add `typing_extensions.Buffer`, a marker class for buffer types, as proposed
   by PEP 688. Equivalent to `collections.abc.Buffer` in Python 3.12. Patch by
   Jelle Zijlstra.

CONTRIBUTING.md

@@ -15,8 +15,8 @@ time, this may require different code for some older Python versions.
 
 `typing_extensions` may also include experimental features that are not yet part of the
 standard library, so that users can experiment with them before they are added to the
-standard library. Such features should ideally already be specified in a PEP or draft
-PEP.
+standard library. Such features should already be specified in a PEP or merged into
+CPython's `main` branch.
 
 `typing_extensions` supports Python versions 3.7 and up.
 

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "flit_core.buildapi"
 # Project metadata
 [project]
 name = "typing_extensions"
-version = "4.5.0"
+version = "4.6.0"
 description = "Backported and Experimental Type Hints for Python 3.7+"
 readme = "README.md"
 requires-python = ">=3.7"