Typing dependencies error

[Zaysevkun]

Describe the bug
After update to version 0.0.5, library seems to not being able to locate typing related dependencies.

To Reproduce
Steps to reproduce the behavior(reproduced on Python 3.6, 3.8):

1. Create empty django project
2. pip install flake and flake8-functions>=0.0.5
3. Run flake
4. See error

Expected behavior
Expected regular flake launch.

Additional context

Logs:

flake recreate: /home/zaysevkun/PycharmProjects/deigmata/.tox/flake
flake installdeps: flake8, flake8-bugbear, flake8-import-order, flake8-functions, flake8-executable, flake8-django, flake8-comprehensions, flake8-commas
flake installed: attrs==20.3.0,flake8==3.8.4,flake8-bugbear==20.11.1,flake8-commas==2.0.0,flake8-comprehensions==3.3.1,flake8-django==1.1.1,flake8-executable==2.1.1,flake8-functions==0.0.5,flake8-import-order==0.18.1,iniconfig==1.1.1,mccabe==0.6.1,mr-proper==0.0.6,packaging==20.8,pluggy==0.13.1,py==1.10.0,pycodestyle==2.6.0,pyflakes==2.2.0,pyparsing==2.4.7,pytest==6.2.1,stdlib-list==0.8.0,toml==0.10.2
flake run-test-pre: PYTHONHASHSEED='2815784988'
flake run-test: commands[0] | flake8 --config=.pep8 deigmata deigmata_backoffice deigmata_frontapi
Traceback (most recent call last):
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 157, in load_plugin
    self._load()
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 134, in _load
    self._plugin = self.entry_point.load()
  File "/usr/lib/python3.8/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8_functions/checker.py", line 6, in <module>
    from flake8_functions.function_purity import check_purity_of_functions
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8_functions/function_purity.py", line 5, in <module>
    from mr_proper.public_api import is_function_pure
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/mr_proper/public_api.py", line 5, in <module>
    from typing_extensions import Literal
ModuleNotFoundError: No module named 'typing_extensions'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/bin/flake8", line 8, in <module>
    sys.exit(main())
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/main/cli.py", line 22, in main
    app.run(argv)
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/main/application.py", line 363, in run
    self._run(argv)
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/main/application.py", line 350, in _run
    self.initialize(argv)
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/main/application.py", line 330, in initialize
    self.find_plugins(config_finder)
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/main/application.py", line 159, in find_plugins
    self.check_plugins.load_plugins()
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 415, in load_plugins
    plugins = list(self.manager.map(load_plugin))
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 302, in map
    yield func(self.plugins[name], *args, **kwargs)
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 413, in load_plugin
    return plugin.load_plugin()
  File "/home/zaysevkun/PycharmProjects/deigmata/.tox/flake/lib/python3.8/site-packages/flake8/plugins/manager.py", line 164, in load_plugin
    raise failed_to_load
flake8.exceptions.FailedToLoadPlugin: Flake8 failed to load plugin "CFQ" due to No module named 'typing_extensions'.
ERROR: InvocationError for command /home/zaysevkun/PycharmProjects/deigmata/.tox/flake/bin/flake8 --config=.pep8 deigmata deigmata_backoffice deigmata_frontapi (exited with code 1)

[KyleKing]

FYI, this is due to dependency changes in mr_proper and not flake8-functions directly. See best-doctor/mr_proper#13 and best-doctor/mr_proper#15 (comment)

[SerhiyRomanov]

Any updates here? I've faced the same issue and still have no idea how to temporary fix it for me.