fix: 低版本node(< v15)不支持replaceAll

Nodejs v15 has V8 8.6 and thus that's the
 first nodejs version where you can use .replaceAll()

lib/core/monitor.js

@@ -421,7 +421,7 @@ class Monitor extends Searcher {
                 let
                     /**转发评语 */
                     RandomStr = getRandomOne(relays)
-                        .replaceAll('${uname}', uname_map[real_uid] || uname),
+                        .replace(/\$\{uname\}/g, uname_map[real_uid] || uname),
                     /**控制字段 */
                     new_ctrl = [];
 
@@ -481,7 +481,7 @@ class Monitor extends Searcher {
                 if (isSendChat) {
                     onelotteryinfo.rid = rid
                     onelotteryinfo.chat = getRandomOne(chats)
-                        .replaceAll('${uname}', uname_map[real_uid] || uname)
+                        .replace(/\$\{uname\}/g, uname_map[real_uid] || uname)
                 }
 
                 alllotteryinfo.push(onelotteryinfo);