Bump coverage from 7.0.3 to 7.0.4 (#519)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.0.3 to 7.0.4.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.0.3...7.0.4)

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

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 -e .
 click==8.1.3
-coverage==7.0.3
+coverage==7.0.4
 grablib==0.8
 pytest==6.2.5
 pytest-aiohttp==1.0.4