Update changelog.

CHANGES.rst

@@ -2,6 +2,47 @@
 Cython Changelog
 ================
 
+3.0.0 alpha 11 (2022-0?-??)
+===========================
+
+Features added
+--------------
+
+* A new decorator ``@cython.dataclasses.dataclass`` was implemented that provides
+  compile time dataclass generation capabilities to ``cdef`` classes (extension types).
+  Patch by David Woods.  (Github issue :issue:`2903`)
+
+* Named expressions (PEP 572) aka. assignment expressions (aka. the walrus operator
+  ``:=``) were implemented.
+  Patch by David Woods.  (Github issue :issue:`2636`)
+
+* The ``cythonize`` command has a new option ``-M`` to generate ``.dep`` dependency
+  files for the compilation unit.  This can be used by external build tools to track
+  these dependencies.  Already available in Cython :ref:`0.29.27`.
+  Patch by Evgeni Burovski.  (Github issue :issue:`1214`)
+
+* The generated C code now compiles in CPython 3.11a4.
+  (Github issue :issue:`4500`)
+
+Bugs fixed
+----------
+
+* Includes all bug-fixes from the :ref:`0.29.27` release.
+
+Other changes
+-------------
+
+* When using type annotations, ``func(x: list)`` or ``func(x: ExtType)`` (and other
+  Python builtin or extension types) now disallow ``None`` as input argument to ``x``.
+  This is consistent with the normal typing semantics in Python, and was a common gotcha
+  for users who did not expect ``None`` to be allowed as input.  To allow ``None``, use
+  ``typing.Optional`` as in ``func(x: Optional[list])``.  ``None`` is also automatically
+  allowed when it is used as default argument, i.e. ``func(x: list = None)``.
+  Note that, for backwards compatibility reasons, this does not apply when using Cython's
+  C notation, as in ``func(list x)``.  Here, ``None`` is still allowed, as always.
+  (Github issues :issue:`3883`, :issue:`2696`)
+
+
 3.0.0 alpha 10 (2022-01-06)
 ===========================
 
@@ -903,16 +944,16 @@ Features added
 * The ``cythonize`` command has a new option ``-M`` to generate ``.dep`` dependency
   files for the compilation unit.  This can be used by external build tools to track
   these dependencies.
-  Patch by Evgeni Burovski.  (Github issue #1214)
+  Patch by Evgeni Burovski.  (Github issue :issue:`1214`)
 
 Bugs fixed
 ----------
 
 * Compilation failures on PyPy were resolved.
-  Patches by Matti Picus.  (Github issues #4509, #4517)
+  Patches by Matti Picus.  (Github issues :issue:`4509`, :issue:`4517`)
 
 * Calls to ``range()`` with more than three arguments did not fail.
-  Original patch by Max Bachmann.  (Github issue #4550)
+  Original patch by Max Bachmann.  (Github issue :issue:`4550`)
 
 * Some C compiler warnings about missing type struct initialisers in Py3.10 were resolved.