Prepare changelog for v18.1.2 release
-v18.1.2 (unreleased)
---------------------
+v18.1.2
+-------
* Fixed :issue:`1377` via :pr:`1785`: Restore a native WSGI-less
HTTP server support.
+* :pr:`1769`: Reduce log level for non-error events in win32.py
v18.1.1
-------
