add：增加多点登录被踢下线的client的client-banned回调

AgoraRTCSDK.min.js

 						default.debug("[".concat(b.clientId, "] quit gateway")), b.state = S, b.socket.close(), O()) : "recover" === e && A()
             },
             b.socket.on("on_notification", function(e) {
+              if(e.detail === "ERR_REPEAT_JOIN") {
+                var t = l({
+                  type: "client-banned",
+                  uid: e.uid,
+                  attr: "onMultiIP"
+                });
+                b.dispatchEvent(t)
+              }
 							if (o.
 						default.debug("[".concat(b.clientId, "] Receive notification: "), e), "ERR_JOIN_BY_MULTI_IP" === I.GatewayErrorCode[e.code]) {
 							return b.dispatchEvent({