Update changelog.

CHANGES.rst

@@ -8,12 +8,18 @@ Cython Changelog
 Features added
 --------------
 
+* ``__del__(self)`` on extension types now maps to ``tp_finalize`` in Python 3.
+  Original patch by ax487.  (Github issue :issue:`3612`)
+
 * Conversion from Python dict to C++ map now supports arbitrary Python mappings,
   not just dicts.
 
 * ``pyximport`` now uses ``cythonize()`` internally.
   Patch by Matus Valo.  (Github issue :issue:`2304`)
 
+* Direct assignments to C++ references are now allowed.
+  Patch by David Woods.  (Github issue :issue:`1863`)
+
 * An initial set of adaptations for GraalVM Python was implemented.  Note that
   this does not imply any general support for this target or that your code
   will work at all in this environment.  But testing should be possible now.