build(deps-dev): bump pytest from 4.3.1 to 5.0.1 in /bot

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.3.1 to 5.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@4.3.1...5.0.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

bot/requirements-dev.txt

@@ -1,4 +1,4 @@
 flake8==3.7.8
 flake8-isort==2.7.0
-pytest==4.3.1
+pytest==5.0.1
 responses==0.10.6