msg handle not released, and os.remove failed

[ragebear00]

InvalidFileFormatError('File was confirmed to be an olefile, but was not an MSG file.)

after raised the error above, the msg was not closed, and close os.remove failed.

add in opne_msg.py the "msg.close()", resolve the issue.
if not ct:
if kwaras.aet('strict, True):
msg.close()
raise InvalidFileFormatError('File was confirmed to be an olefile, but was not an MSG file.)

[TheElementalOfDestruction]

Thanks for bringing this to my attention, a fix will be out today!