Remove unneeded dependencies and update others (#715)

Author: willemarcel

requirements/base.txt

@@ -5,23 +5,17 @@ django==2.2.28
 # Configuration
 django-environ==0.4.5
 
-# Forms
-django-braces==1.14.0
-
-# Models
-django-model-utils==4.2.0
-
 # For authentication with OSM
 social-auth-app-django==5.1.0
-social-auth-core==4.5.3
+social-auth-core==4.5.4
 
 # DRF and DRF-gis
 djangorestframework==3.11.2
 djangorestframework-gis==1.0.0
 djangorestframework-csv==2.1.1
 django-filter==2.4.0
 django-cors-headers==3.7.0
-drf-yasg==1.20.0
+drf-yasg==1.21.5
 
 # For the persistence stores
 psycopg2-binary>=2.8,<2.9