Scheduled biweekly dependency update for week 11 (#896)

* Update flake8 from 3.8.4 to 3.9.0

* Update sphinx from 3.4.3 to 3.5.2

* Update pyyaml from 5.3.1 to 5.4.1

* Update faker from 5.6.1 to 6.6.0

* Update pytest from 6.2.1 to 6.2.2

* Update pytest-cov from 2.11.0 to 2.11.1

Co-authored-by: Alan Crosswell <alan@columbia.edu>

Author: pyup-bot

requirements/requirements-codestyle.txt

@@ -1,4 +1,4 @@
 black==20.8b1
-flake8==3.8.4
+flake8==3.9.0
 flake8-isort==4.0.0
 isort==5.7.0

requirements/requirements-documentation.txt

@@ -1,3 +1,3 @@
 recommonmark==0.7.1
-Sphinx==3.4.3
+Sphinx==3.5.2
 sphinx_rtd_theme==0.5.1

requirements/requirements-optionals.txt

@@ -1,4 +1,4 @@
 django-filter==2.4.0
 django-polymorphic==3.0.0
-pyyaml==5.3.1
+pyyaml==5.4.1
 uritemplate==3.0.1

requirements/requirements-testing.txt

@@ -1,8 +1,8 @@
 django-debug-toolbar==3.2
 factory-boy==3.2.0
-Faker==5.6.1
-pytest==6.2.1
-pytest-cov==2.11.0
+Faker==6.6.0
+pytest==6.2.2
+pytest-cov==2.11.1
 pytest-django==4.1.0
 pytest-factoryboy==2.1.0
 snapshottest==0.6.0