upload info init from json with safe array

Author: YangSen-qn

QiniuSDK/Storage/QNUploadInfoV1.m

@@ -46,7 +46,7 @@ + (instancetype)info:(id <QNUploadSource>)source
     NSString *type = dictionary[kQNUploadInfoTypeKey];
     NSArray *blockInfoList = dictionary[@"blockList"];
 
-    NSMutableArray <QNUploadBlock *> *blockList = [NSMutableArray array];
+    QNMutableArray *blockList = [QNMutableArray array];
     if ([blockInfoList isKindOfClass:[NSArray class]]) {
         for (int i = 0; i < blockInfoList.count; i++) {
             NSDictionary *blockInfo = blockInfoList[i];

QiniuSDK/Storage/QNUploadInfoV2.m

@@ -49,7 +49,7 @@ + (instancetype)info:(id <QNUploadSource>)source
 
     NSArray *dataInfoList = dictionary[@"dataList"];
 
-    NSMutableArray <QNUploadData *> *dataList = [NSMutableArray array];
+    QNMutableArray *dataList = [QNMutableArray array];
     if ([dataInfoList isKindOfClass:[NSArray class]]) {
         for (int i = 0; i < dataInfoList.count; i++) {
             NSDictionary *dataInfo = dataInfoList[i];