[damned-lies] Upgraded social auth django to 4.0.0

[Claude Paroz <claudep src gnome org>]

commit 13900633bdf7dfa41d4ec628e1e9778f8a8869d6
Author: Claude Paroz <claude 2xlibre net>
Date:   Sat Jul 18 17:21:33 2020 +0200

    Upgraded social auth django to 4.0.0

 requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/requirements.txt b/requirements.txt
index b347196c..c696af9c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 django>=2.2.9,<3.1
 pillow
 mysqlclient
-social-auth-app-django==3.1.0
+social-auth-app-django==4.0.0
 django-debug-toolbar
 markdown==3.0.1
 pyicu==2.3.1  # 2.4.2 fails to compile on some platforms