Pin coverage to latest version 7.6.8

[pyup-bot]

This PR pins coverage to the latest release 7.6.8.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

• PyPI: https://pypi.org/project/coverage
• Repo: https://github.com/nedbat/coveragepy

Summary by Sourcery

Build:

• Pin the 'coverage' package to version 7.6.8 in the development requirements.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR updates the coverage package dependency to a specific version (7.6.8) in the development requirements file. The change is straightforward, involving a single line modification to pin the package version.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Pin coverage package to specific version	Update coverage dependency from unspecified version to 7.6.8	requirements_dev.txt

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[sourcery-ai]

We have skipped reviewing this pull request. It seems to have been created by a bot (hey, pyup-bot!). We assume it knows what it's doing!