Bump coverage from 6.0 to 6.0.1 (#6063)

* Bump coverage from 6.0 to 6.0.1

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.0 to 6.0.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.0...6.0.1)

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

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requirements/test.txt

@@ -1,7 +1,7 @@
 
 -r base.txt
 Brotli==1.0.9
-coverage==6.0
+coverage==6.0.1
 cryptography==3.3.1; platform_machine!="i686" and python_version<"3.9" # no 32-bit wheels; no python 3.9 wheels yet
 freezegun==1.1.0
 mypy==0.910; implementation_name=="cpython"