Dependency lockfile needs investigation

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Many automated dependency updates from @dependabot are failing and certain versions of certain dependencies are either not available or are not compatible with other dependencies.

Pull requests affected by this

1. Bump black from 21.12b0 to 22.10.0 #437
2. Bump pytest from 6.2.5 to 7.1.3 #439
3. Bump gevent from 21.12.0 to 22.8.0 #440
4. Bump pytest-isort from 2.0.0 to 3.0.0 #441
5. Bump flake8 from 3.9.2 to 5.0.4 #442
6. Bump pytest-cov from 3.0.0 to 4.0.0 #443

For now, the workaround employed is ignoring those PRs for now and coming back to them when new PRs for the same dependencies are created for the newer versions. If they pass the CI, the problem would automatically be solved but if not, the dependency lockfile needs to be investigated.