Bump django from 3.2.6 to 3.2.20 in /requirements

Bumps [django](https://github.com/django/django) from 3.2.6 to 3.2.20.
- [Commits](django/django@3.2.6...3.2.20)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/dev.txt

@@ -14,8 +14,6 @@ asgiref==3.3.4
     #   django
 astroid==2.6.6
     # via pylint
-atomicwrites==1.4.0
-    # via pytest
 attrs==21.2.0
     # via
     #   automat
@@ -40,12 +38,6 @@ charset-normalizer==2.0.4
     # via requests
 click==8.0.1
     # via pip-tools
-colorama==0.4.4
-    # via
-    #   click
-    #   pylint
-    #   pytest
-    #   sphinx
 constantly==15.1.0
     # via twisted
 coverage==5.5
@@ -59,7 +51,7 @@ cryptography==3.4.7
     #   service-identity
 daphne==3.0.2
     # via channels
-django==3.2.6
+django==3.2.20
     # via
     #   -r dev.in
     #   channels
@@ -213,7 +205,7 @@ wheel==0.37.0
     # via pip-tools
 wrapt==1.12.1
     # via astroid
-zope.interface==5.4.0
+zope-interface==5.4.0
     # via twisted
 
 # The following packages are considered to be unsafe in a requirements file: