Update faker from 1.0.2 to 1.0.4 (#597)

Author: pyup-bot

requirements-development.txt

@@ -3,7 +3,7 @@ django-debug-toolbar==1.11
 django-filter==2.1.0
 django-polymorphic==2.0.3
 factory-boy==2.11.1
-Faker==1.0.2
+Faker==1.0.4
 flake8==3.7.7
 flake8-isort==2.6.0
 isort==4.3.15