Merge pull request 'update notification opts' (#63) from feature/campaign into develop

Reviewed-on: #63

js/model/selly.go

@@ -14,6 +14,7 @@ type PushNotification struct {
 type NotificationOptions struct {
 	Title      string `json:"title"`
 	Content    string `json:"content"`
+	CampaignID string `json:"campaignId,omitempty"`
 }
 
 // PayloadUpdateSellerAffiliateStatistic ...