Update guessit to 3.0.0 (+subliminal update)

[sharkykh]

• Migration Docs: https://github.com/guessit-io/guessit/blob/3.0.0/docs/migration2to3.rst
• Waiting on Split composite status into status and quality, add Unknown as valid quality #4221.
• In order to update guessit, subliminal has to be updated as well.
  I started a branch here, but hit a snag with WEBRip and such. pymedusa/subliminal#1
• Tip: Review without the first commit (the vendored guessit update)

[labrys]

Careful there's a regression in Guessit for titles with periods in it (e.g. Marvel's Agents of S.H.E.I.L.D.) where it drops some of the periods (e.g. S H.E.I.L.D.). Might not be a problem with expected titles, but should be checked.

[sharkykh]

@labrys You sure? I get the correct title on both guessit and tests/report_guessit.py.
Can you give me an example filename for it?

Edit: I tried Marvels.Agents.of.S.H.I.E.L.D.S05E22.720p.HDTV.x264-KILLERS

[labrys]

SSCE

import guessit
guess = guessit.guessit("Marvel's Agents of S.H.I.E.L.D.")
print(guess['title'])
# Marvel's Agents of S H.I.E.L.D.
#                     ^

See guessit-io/guessit#546

[ratoaq2]

It also happens in 2.1.4... Upgrading to 3.0 shouldn't be a problem