MacOS conflict with enum package

[vladkozlov69]

When trying to run kflash.py on MacOS 10.15.6, I am getting the following error:

Uploading .pio/build/sipeed-maix-bit-mic/firmware.bin
Traceback (most recent call last):
File "/Users/vkozlov/.platformio/packages/tool-kflash-kendryte210/kflash.py", line 13, in
import argparse
File "/Users/vkozlov/.platformio/python3/lib/python3.8/argparse.py", line 88, in
import re as _re
File "/Users/vkozlov/.platformio/python3/lib/python3.8/re.py", line 145, in
class RegexFlag(enum.IntFlag):
AttributeError: module 'enum' has no attribute 'IntFlag'
*** [upload] Error 1

Most probably it is related with enum34 package from built-in MacOS python.