Bump pytest-selenium from 1.15.1 to 1.16.0

Bumps [pytest-selenium](https://github.com/pytest-dev/pytest-selenium) from 1.15.1 to 1.16.0.
- [Release notes](https://github.com/pytest-dev/pytest-selenium/releases)
- [Changelog](https://github.com/pytest-dev/pytest-selenium/blob/master/docs/news.rst)
- [Commits](pytest-dev/pytest-selenium@v1.15.1...v1.16.0)

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

Pipfile

@@ -15,4 +15,4 @@ flake8-docstrings = "==1.3.0"
 flake8-isort = "==2.6.0"
 pytest = "==4.1.1"
 pytest-cov = "==2.6.1"
-pytest-selenium = "==1.15.1"
+pytest-selenium = "==1.16.0"