psf / black / 926

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master: 96%

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travis-ci-com

Add all listed by projects into primer.json + Enable on CI Runs
- Change workers default to 2 as black uses system CPU count
- Increase timeout to 5 mins for subprocess black runs
- Takes about 120s for 13 (3 disabled) projects on my 2018 Macbook Pro
  - I was not removing directories tho ...

Will open an issue to investigate the failing projects and make this run cleaner.
- Once we get more stable we can expect more repos to be black formatted

Run it:
- `black-primer -k -w /tmp/primer_large_test --debug --rebase`
```
[2020-05-20 21:44:01,273] DEBUG: Starting /Users/cooper/venvs/b/bin/black-primer (cli.py:125)
[2020-05-20 21:44:01,273] DEBUG: Using selector: KqueueSelector (selector_events.py:53)
[2020-05-20 21:44:01,274] INFO: 16 projects to run Black over (lib.py:276)
[2020-05-20 21:44:01,274] DEBUG: Using 2 parallel workers to run Black (lib.py:281)
[2020-05-20 21:44:01,274] DEBUG: worker 0 workng on aioexabgp (lib.py:215)
[2020-05-20 21:44:01,276] DEBUG: worker 1 workng on attrs (lib.py:215)
[2020-05-20 21:44:02,443] INFO: Finished aioexabgp (lib.py:249)
[2020-05-20 21:44:02,443] DEBUG: worker 0 workng on bandersnatch (lib.py:215)
[2020-05-20 21:44:04,409] INFO: Finished bandersnatch (lib.py:249)
[2020-05-20 21:44:04,409] DEBUG: worker 0 workng on channels (lib.py:215)
[2020-05-20 21:44:04,702] INFO: Finished attrs (lib.py:249)
[2020-05-20 21:44:04,702] DEBUG: worker 1 workng on django (lib.py:215)
[2020-05-20 21:44:04,702] INFO: Skipping django as it's disabled via config (lib.py:222)
[2020-05-20 21:44:04,702] DEBUG: worker 1 workng on flake8-bugbear (lib.py:215)
[2020-05-20 21:44:05,813] INFO: Finished channels (lib.py:249)
[2020-05-20 21:44:05,813] DEBUG: worker 0 workng on hypothesis (lib.py:215)
[2020-05-20 21:44:06,071] INFO: Finished flake8-bugbear (lib.py:249)
[2020-05-20 21:44:06,071] DEBUG: worker 1 workng on pandas (lib.py:215)
[2020-05-20 21:44:06,071] INFO: Skipping pandas as it's disabled via config (lib.py:222)
[2020-05-20 21:44:0... (continued)

2 of 2 new or added lines in 1 file covered. (100.0%)

4516 of 4700 relevant lines covered (96.09%)

2.88 hits per line