failes with upcoming flake8 3.8.0

[fschulze]

With the recently released flake8 3.8.0a2 the plugin fails:

lib/python2.7/site-packages/pytest_flake8.py:191: in check_file
    app.parse_preliminary_options_and_args(args)
AttributeError: 'Application' object has no attribute 'parse_preliminary_options_and_args'

[bobhy]

I have a V2 of this plugin which works (at least for me) with flake8 3.7 and 3.8. It's clonable from: https://github.com/bobhy/pytest-flake8, be sure to checkout branch use_flake8_config. Note, if you try this, it depends on flake8 config file almost exclusively.

[hoIIer]

could we update the title to include the error? was just pulling my hair out trying to figure out why my ci/cd just started failing out of the blue with this error :)

[noviluni]

I just added a PR that fixed this: #68

[MartinThoma]

I just got this error with flake8-3.8.2 and pytest-flake8==1.0.4.

A work-around until this one is fixed seems to be to pin flake8==3.7.9

[FlorianHeigl]

@MartinThoma thank you so much, I got this while trying to fix a CI chain for an old project that I want to revive & port forward. I'm definitely not the right person to do that, but the one that does it. You saved me a lot of time now!

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