Update sh to 1.12.9

[pyup-bot]

There's a new version of sh available.
You are currently using 1.12.3. I have updated it to 1.12.9

These links might come in handy: PyPI | Changelog | Repo

Changelog

1.12.9

• added _bg_exc for silencing exceptions in background threads 350

1.12.8

• bugfix for patched glob.glob on python3.5 341

1.12.7

• added _out and _out_bufsize validator 346
• bugfix for internal stdout thread running when it shouldn't 346

1.12.6

• regression bugfix on timeout 344
• regression bugfix on _ok_code=None

1.12.5

• further improvements on cpu usage

1.12.4

• regression in cpu usage 339

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖