Update pytest from 6.1.2 to 6.2.1

Author: pyup-bot

requirements/requirements-testing.txt

@@ -1,7 +1,7 @@
 django-debug-toolbar==3.2
 factory-boy==3.1.0
 Faker==5.0.2
-pytest==6.1.2
+pytest==6.2.1
 pytest-cov==2.10.1
 pytest-django==4.1.0
 pytest-factoryboy==2.0.3