build(deps-dev): Bump pytest from 5.2.4 to 5.3.0 in /bot (#288)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.2.4 to 5.3.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.2.4...5.3.0)

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

Author: dependabot-preview[bot]

bot/requirements-dev.txt

@@ -1,6 +1,6 @@
 jsonschema==3.2.0
 json-e==3.0.0
 pre-commit==1.20.0
-pytest==5.2.4
+pytest==5.3.0
 pytest-responses==0.4.0
 responses==0.10.6