Add asgiref requirement to work with new simple-history version

django-simple-history introduced a dependency on asgiref>=3.6 but
didn't include it in their requirements. Add this dependency at
least until we upgrade to Django 4.2. See issue:
jazzband/django-simple-history#1255

requirements/dev-requirements.txt

@@ -6,7 +6,9 @@
 #
 alabaster==0.7.13
     # via sphinx
-asgiref==3.5.1
+appnope==0.1.3
+    # via ipython
+asgiref==3.7.2
     # via
     #   -c requirements/requirements.txt
     #   django
@@ -245,7 +247,9 @@ types-pyyaml==6.0.12.12
     # via django-stubs
 typing-extensions==4.8.0
     # via
+    #   -c requirements/requirements.txt
     #   -c requirements/test-requirements.txt
+    #   asgiref
     #   astroid
     #   black
     #   django-stubs

requirements/requirements.in

@@ -35,3 +35,7 @@ django-simple-history
 # mysql
 # Pinned because versions >=2.2 require pkg-config.
 mysqlclient # https://github.com/PyMySQL/mysqlclient
+
+# Required for django < 4.2 and django-simple-history is updated.
+# See issue https://github.com/jazzband/django-simple-history/issues/1255
+asgiref>=3.6

requirements/requirements.txt

@@ -8,8 +8,10 @@ argon2-cffi==21.3.0
     # via -r requirements/requirements.in
 argon2-cffi-bindings==21.2.0
     # via argon2-cffi
-asgiref==3.5.1
-    # via django
+asgiref==3.7.2
+    # via
+    #   -r requirements/requirements.in
+    #   django
 async-timeout==4.0.2
     # via redis
 build==1.0.3
@@ -167,6 +169,8 @@ tomli==2.0.1
     #   build
     #   pip-tools
     #   pyproject-hooks
+typing-extensions==4.8.0
+    # via asgiref
 urllib3==1.26.9
     # via requests
 wheel==0.41.3

requirements/test-requirements.txt

@@ -78,6 +78,7 @@ types-urllib3==1.26.25.14
     # via types-requests
 typing-extensions==4.8.0
     # via
+    #   -c requirements/requirements.txt
     #   django-test-migrations
     #   faker
 urllib3==1.26.9