PROD-871 rename Customer API to Server API

Author: jameshfisher

lib/pusher/native_notification/client.rb

@@ -3,7 +3,7 @@ module NativeNotification
     class Client
       attr_reader :app_id, :host
 
-      API_PREFIX = "customer_api"
+      API_PREFIX = "server_api"
       API_VERSION = "v1"
       GCM_TTL = 241920
       RESTRICTED_GCM_PAYLOAD_KEYS = [:to, :registration_ids]
@@ -120,4 +120,4 @@ def deep_symbolize_keys!(hash)
       end
     end
   end
-end
+end