Support Enum keyword arguments

[JukkaL]

enum.Enum(...) accepts keyword arguments such as module, but mypy complains about them.

Example from #2306 (comment):

from enum import Enum

# Error: Too many arguments for Enum()
PictureSize = Enum('PictureSize', 'P0 P1 P2 P3 P4 P5 P6 P7 P8', type=str, module=__name__)

Documentation: https://docs.python.org/3/library/enum.html#functional-api

[anentropic]

I made an attempt to fix this in typeshed, please review when you have time, thanks

[elazarg]

Related namedtuple issues: #2127 #2124

[97littleleaf11]

Has been fixed!