[deps] Updated openwisp-users to 0.4.0

Author: nemesifier

requirements.txt

@@ -6,7 +6,7 @@ django-reversion>=3.0.5,<3.1.0
 django-x509~=0.8.0
 django-taggit~=1.3.0
 openwisp-utils~=0.6.0
-openwisp-users~=0.3.0
+openwisp-users~=0.4.0
 django-loci>=0.3.1,<0.4.0
 djangorestframework-gis>=0.12.0,<0.16.0
 paramiko>=2.7.1,<2.8.0