Issue #19505: The items, keys, and values views of OrderedDict now support
reverse iteration using reversed().
Issue #20636: Improved the repr of Tkinter widgets.
fix #21076: turn signal module constants into enums
fix versionchanged version
merge 3.2
merge 3.3
merge 3.4
Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets
__file__.

This causes _frozen_importlib to no longer have __file__ set as well
as any frozen module imported using imp.init_frozen() (which is
deprecated).
merge of fix for issue #20942
merge along w/ fix for issue #2107 (commit c9239171e429)
Issue #21076: the C signal module has been renamed to _signal
Finish up signal -> _signal change
Issue #21076: sigpending() is not available on Windows
update Misc/NEWS
Issue #17621: Introduce importlib.util.LazyLoader.
merge 3.4 (#21128)
Issue #21118: Fix _PyUnicodeTranslateError_Create(), add missing format
character for the "end" parameter
Issue #21118: Use _PyUnicodeWriter API in str.translate() to simplify and
factorize the code
make temporary read-only files writable, so rmtree can remove them (#21128)
Issue #21118: Fix _PyUnicodeTranslateError_Create(), add missing format
character for the "end" parameter