Bump coverage from 6.2 to 6.3

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](https://github.com/nedbat/coveragepy/compare/6.2...6.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -25,7 +25,7 @@ pytz = "^2021.3"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"
-coverage = {extras = ["toml"], version = "^6.2"}
+coverage = {extras = ["toml"], version = "^6.3"}
 safety = "^1.10.3"
 mypy = "^0.931"
 typeguard = "^2.13.2"