Update version

- Display django version in "about" dialog

InvenTree/part/templatetags/inventree_extras.py

@@ -55,6 +55,12 @@ def inventree_version(*args, **kwargs):
     return version.inventreeVersion()
 
 
+@register.simple_tag()
+def django_version(*args, **kwargs):
+    """ Return Django version string """
+    return version.inventreeDjangoVersion()
+
+
 @register.simple_tag()
 def inventree_commit_hash(*args, **kwargs):
     """ Return InvenTree git commit hash string """