refactor: replace global new

Signed-off-by: MiaoWoo <admin@yumc.pw>

src/core/block-loader.ts

@@ -13,6 +13,7 @@ import * as fs from 'fs'
 import CRest from './rest-loader'
 import { TYPE_TRANSACTION } from '../constant/account';
 import { STreeBuffer } from './base';
+import { RBTree } from './library';
 //import * as crypto from 'crypto';
 require('./block-loader-const');
 const STAT_BLOCK_LOAD_PERIOD = global.CONSENSUS_PERIOD_TIME / 5;
@@ -1197,7 +1198,7 @@ export default class CBlock extends CRest {
     GetHistoryTree(typedata) {
         var Tree = global.HistoryBlockBuf.LoadValue(typedata, 1);
         if (!Tree) {
-            Tree = new global.RBTree(global.CompareItemHash)
+            Tree = new RBTree(global.CompareItemHash)
             global.HistoryBlockBuf.SaveValue(typedata, Tree)
         }
         return Tree;