Fix flake8 violations

Author: wscourge

chartmogul/api/customer.py

@@ -15,6 +15,7 @@
 from .task import Task
 from .customers.subscription import CustomerSubscription
 
+
 class Address(DataObject):
     class _Schema(Schema):
         address_zip = fields.String(allow_none=True)

chartmogul/api/customers/subscription.py

@@ -66,6 +66,7 @@ def _loadJSON(cls, jsonObj):
     "list_imported", "get", "/import/customers{/uuid}/subscriptions"
 )
 
+
 @classmethod
 def _deprecated_list_imported(cls, config, **kwargs):
     warnings.warn(
@@ -75,6 +76,7 @@ def _deprecated_list_imported(cls, config, **kwargs):
     )
     return _original_list_imported.__func__(cls, config, **kwargs)
 
+
 CustomerSubscription.list_imported = _deprecated_list_imported
 CustomerSubscription.cancel = CustomerSubscription._method(
     "cancel", "patch", "/import/subscriptions{/uuid}"