update change log for 1.4.7

CHANGES.txt

@@ -1,6 +1,24 @@
 Comtypes CHANGELOG
 ==================
 
+Release 1.4.7
+--------------
+* Improve ``_CArrayType`` alias import. By @junkmd.
+* Rename ``_byref_type`` and ``_carg_obj`` to ``_CArgObject``. By @junkmd.
+* Fix typos and make the wording more natural in ``README.md``. By @umarbutler.
+* Modernize ``BSTR`` definition. By @junkmd.
+* Modernize ``tagDEC`` definition. By @junkmd.
+* Remove methods with mangling names in ``typeinfo``. By @junkmd.
+* Rename ``test_istream`` to ``test_stream``. By @junkmd.
+* Add ``test_msvidctl``. By @junkmd.
+* Add ``test_storage``. By @junkmd.
+* Add ``test_monikers``. By @junkmd.
+* Add ``test_shelllink``. By @junkmd.
+* Add ``test_persist``. By @junkmd.
+* Modernize ``persist``. By @junkmd.
+* Add type annotations to ``shelllink``. By @junkmd.
+* Bump ``python_requires`` to ``>=3.8`` in ``setup.cfg``. By @junkmd.
+
 Release 1.4.6
 --------------
 * Add tests and method annotations for ``IRecordInfo``. By @junkmd.