Remove pin for django-csp. (#2132)

* Remove pin for django-csp.

The toolbar now supports django-csp v4

* Add django-template-partials to requirements file

This allows make test to succeed again.

Author: tim-schilling

requirements_dev.txt

@@ -11,7 +11,8 @@ html5lib
 selenium
 tox
 black
-django-csp<4 # Used in tests/test_csp_rendering
+django-template-partials
+django-csp # Used in tests/test_csp_rendering
 
 # Integration support