CONTRIBUTING contradicted by code (setup.cfg and pyproject.toml)

[morrison12]

Describe the bug

The third bullet under Contributing/Code Style says single quotes everywhere possible but

1. in setup.cfg line 13 is inline-quotes = double and
2. in pyproject.toml skip-string-normalization = true is not present in the [tool.black] section which ensures black will normalize quotes to double quotes

I'm happy to provide a PR but wanted to check whether the style has changed first

To Reproduce

n/a

Expected behavior

If Contributing/Code Style is still correct, the settings for flake8 and black should match it.

Meta

current HEAD on 2022-08-10