Merge pull request #1456 from jazzband/master-to-main

Rename Django's dev branch to main.

Author: tim-schilling

tox.ini

@@ -16,7 +16,7 @@ deps =
     sqlite: mock
     postgresql: psycopg2-binary
     mysql: mysqlclient
-    djmain: https://github.com/django/django/archive/master.tar.gz
+    djmain: https://github.com/django/django/archive/main.tar.gz
     coverage
     Jinja2
     html5lib