Bump coverage from 5.3 to 5.3.1

Bumps [coverage](https://github.com/nedbat/coveragepy) from 5.3 to 5.3.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@coverage-5.3...coverage-5.3.1)

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

Author: dependabot[bot]

setup.py

@@ -45,7 +45,7 @@
     packages=find_packages(),
     extras_require={
         'dev': [
-            'coverage==5.3',
+            'coverage==5.3.1',
             'pylint==2.6.0',
             'pytest==6.2.1',
             'twine==3.2.0',