Scheduled biweekly dependency update for week 44 (#852)

* Update sphinx from 3.2.1 to 3.3.0
* Update pyyaml from 5.3 to 5.3.1
* Update pytest from 6.1.1 to 6.1.2
* Update pytest-django from 4.0.0 to 4.1.0

Author: pyup-bot

requirements/requirements-documentation.txt

@@ -1,3 +1,3 @@
 recommonmark==0.6.0
-Sphinx==3.2.1
+Sphinx==3.3.0
 sphinx_rtd_theme==0.5.0

requirements/requirements-optionals.txt

@@ -1,4 +1,4 @@
 django-filter==2.4.0
 django-polymorphic==3.0.0
-pyyaml==5.3
+pyyaml==5.3.1
 uritemplate==3.0.1

requirements/requirements-testing.txt

@@ -1,8 +1,8 @@
 django-debug-toolbar==3.1.1
 factory-boy==3.1.0
 Faker==4.14.0
-pytest==6.1.1
+pytest==6.1.2
 pytest-cov==2.10.1
-pytest-django==4.0.0
+pytest-django==4.1.0
 pytest-factoryboy==2.0.3
 snapshottest==0.6.0