Correct supported releases of Django to include 4.0.

Author: n2ygk

setup.cfg

@@ -32,7 +32,7 @@ zip_safe = False
 # jwcrypto has a direct dependency on six, but does not list it yet in a release
 # Previously, cryptography also depended on six, so this was unnoticed
 install_requires =
-	django >= 2.2, != 4.0.0
+	django >= 2.2, <= 4.1
 	requests >= 2.13.0
 	oauthlib >= 3.1.0
 	jwcrypto >= 0.8.0