build(deps): bump coverage from 6.2 to 6.3 (#733)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.2 to 6.3.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.2...6.3)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements-test.txt

@@ -5,7 +5,7 @@ black==21.12b0
 codespell==2.1.0
 
 jsonschema==4.4.0
-coverage==6.2
+coverage==6.3
 doc8==0.10.1
 
 types-python-dateutil==2.8.8