Merge pull request #1437 from napalm-automation/dependabot/pip/tox-3.23.1

Bump tox from 3.23.0 to 3.23.1

Author: mirceaulinic

requirements-dev.txt

@@ -8,5 +8,5 @@ pytest-json==0.4.0
 pytest-pythonpath==0.7.3
 pylama==7.7.1
 mock==4.0.3
-tox==3.23.0
+tox==3.23.1
 mypy==0.812