Add permit_join_timeout to bridge/info

lib/zigbee.js

@@ -141,10 +141,14 @@ class Zigbee extends events.EventEmitter {
         }
     }
 
-    async getPermitJoin() {
+    getPermitJoin() {
         return this.herdsman.getPermitJoin();
     }
 
+    getPermitJoinTimeout() {
+        return this.herdsman.getPermitJoinTimeout();
+    }
+
     getClients() {
         return this.herdsman.getDevices().filter((device) => device.type !== 'Coordinator');
     }