Bump pytest from 6.2.1 to 6.2.2 (#734)

Author: dependabot[bot]

requirements/requirements_dev.txt

@@ -10,7 +10,7 @@ hypothesis==5.49.0
 placebo==0.9.0
 pre-commit==2.10.1
 pylint==2.6.0
-pytest==6.2.1
+pytest==6.2.2
 pytest-black==0.3.12
 pytest-cov==2.11.0
 pytest-datadir==1.3.1