Bump coverage from 4.5.4 to 5.0.3
Bumps [coverage](https://github.com/nedbat/coveragepy) from 4.5.4 to 5.0.3.
- [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/coverage-4.5.4...coverage-5.0.3)
Signed-off-by: dependabot-preview[bot] <[email protected]>
dependabot-preview[bot]