Add support for yapf>=0.21.0<0.27.0 and fix filename in .ci/generate_bear_metadata.py

[areebbeigh]

Modify test_allow_multiline_lambdas to be
version specific.

Closes #2873

Change "overrides" filename from
package-manager-requirements.yaml to pm-requirements.yaml

Fixes #2936

Checklist

• I read the commit guidelines and I've followed
  them.
• I ran coala over my code locally. (All commits have to pass
  individually. It is not sufficient to have "fixup commits" on your PR,
  our bot will still report the issues for the previous commit.) You will
  likely receive a lot of bot comments and build failures if coala does not
  pass on every single commit!

[jayvdb]

Needs a rebase

[areebbeigh]

Needs a rebase

Done.
Heads up: Merge conflict in bear-requirements.yaml was resolved by hand (merge both incoming changes). Please let me know if I'm supposed to re-generate it.

[jayvdb]

Refetch master bear-requirements.yaml

Use .ci/generate_bear_metadata.py , and then run moban.

[areebbeigh]

.ci/generate_bear_metadata.py

I'm running into:

Warning: Both package-manager-requirements.yaml and /home/areebbeigh/.cache/moban/repos/mobans/package-manager-requirements.yaml does not exist

and I suspect this is because running ci/generate_bear_metadata.py sets overrides: package-manager-requirements.yaml whereas it should be overrides: pm-requirements.yaml.

New issue? Although this is probably just a change in

coala-bears/.ci/generate_bear_metadata.py

Line 461 in afb068b

requirements['overrides'] = 'package-manager-requirements.yaml'

[jayvdb]

Yup; new issue. That is a bug in my PR.

[jayvdb]

You can add the fix to this PR as a separate commit.

[areebbeigh]

You can add the fix to this PR as a separate commit.

Done.

[jayvdb]

Sorry ; wrong button press.

@areebbeigh , this needs another rebase, but please also revise your commit messages to follow the coala commit guidelines. specifically the first line should start with a filename of the most important file in the commit which is being modified (usually not a file which is generated).

[jayvdb]

I'm going to merge this despite it failing due to #2937 , which I'll fix after this is merged