Bump coverage from 5.2.1 to 5.3

Bumps [coverage](https://github.com/nedbat/coveragepy) from 5.2.1 to 5.3.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@coverage-5.2.1...coverage-5.3)

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

Author: dependabot[bot]

poetry.lock

@@ -26,7 +26,7 @@ pyyaml = "^5.3.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.0.1"
-coverage = {extras = ["toml"], version = "^5.2"}
+coverage = {extras = ["toml"], version = "^5.3"}
 safety = "^1.9.0"
 mypy = "^0.782"
 typeguard = "^2.9.1"