Bump pytest-cov from 2.10.0 to 2.10.1 (#511)

Author: dependabot[bot]

requirements/requirements_dev.txt

@@ -12,7 +12,7 @@ pre-commit==2.6.0
 pylint==2.6.0
 pytest==6.1.1
 pytest-black==0.3.10
-pytest-cov==2.10.0
+pytest-cov==2.10.1
 pytest-datadir==1.3.1
 pytest-flake8==1.0.6
 pytest-mock==3.3.1