Bump flake8 from 3.5.0 to 3.6.0 (#216)

Bumps [flake8](https://gitlab.com/pycqa/flake8) from 3.5.0 to 3.6.0.
- [Release notes](https://gitlab.com/pycqa/flake8/tags)
- [Commits](https://gitlab.com/pycqa/flake8/compare/3.5.0...3.6.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Pipfile

@@ -13,7 +13,7 @@ selenium = "==3.14.1"
 [dev-packages]
 
 coveralls = "==1.5.1"
-flake8 = "==3.5.0"
+flake8 = "==3.6.0"
 flake8-docstrings = "==1.3.0"
 flake8-isort = "==2.5"
 pytest = "==3.9.2"