Update pytest from 5.2.1 to 5.2.2 (#727)

Author: pyup-bot

requirements/requirements-testing.txt

@@ -1,7 +1,7 @@
 django-debug-toolbar==2.0
 factory-boy==2.12.0
 Faker==2.0.3
-pytest==5.2.1
+pytest==5.2.2
 pytest-cov==2.8.1
 pytest-django==3.6.0
 pytest-factoryboy==2.0.3