Bump pytest from 5.2.2 to 5.2.3 (#1102)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.2.2 to 5.2.3.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.2.2...5.2.3)

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

test-requirements.txt

@@ -1,7 +1,7 @@
 coverage==4.5.4
 jsonschema==3.1.1
 pre-commit==1.20.0
-pytest==5.2.2
+pytest==5.2.3
 pytest-cov==2.8.1
 pytest-responses==0.4.0
 responses==0.10.6