Update converter.py

Author: scotmatson

graphene_sqlalchemy/converter.py

@@ -92,6 +92,8 @@ def convert_sqlalchemy_type(type, column, registry=None):
 @convert_sqlalchemy_type.register(types.Unicode)
 @convert_sqlalchemy_type.register(types.UnicodeText)
 @convert_sqlalchemy_type.register(postgresql.UUID)
+@convert_sqlalchemy_type.register(postgresql.INET)
+@convert_sqlalchemy_type.register(postgresql.CIDR)
 @convert_sqlalchemy_type.register(TSVectorType)
 def convert_column_to_string(type, column, registry=None):
     return String(description=get_column_doc(column),