Merge pull request #167 from wicked-tc130/master

 ios-getHistoryMessage新增未读消息数

Author: wicked-tc130

ios/RCTJMessageModule/JMessageHelper.m

@@ -594,6 +594,8 @@ - (NSMutableDictionary *)messageToDictionary {
 
     dict[@"createTime"] = self.timestamp;
 
+    NSNumber *unreadCount = @(self.getMessageUnreadCount);
+    dict[@"unreceiptCount"] = unreadCount;
     switch (self.contentType) {
         case kJMSGContentTypeUnknown: {
             dict[@"type"] = @"unknown";