fix: handle failure in connect

Author: allenlinli

Source/SocketIO/Client/SocketIOClient.swift

@@ -135,6 +135,7 @@ open class SocketIOClient : NSObject, SocketIOClientSpec {
 
         guard let manager = self.manager, status != .connected else {
             DefaultSocketLogger.Logger.log("Tried connecting on an already connected socket", type: logType)
+            handler?()
             return
         }
 
@@ -152,8 +153,11 @@ open class SocketIOClient : NSObject, SocketIOClientSpec {
         guard timeoutAfter != 0 else { return }
 
         manager.handleQueue.asyncAfter(deadline: DispatchTime.now() + timeoutAfter) {[weak self] in
-            guard let this = self, this.status == .connecting || this.status == .notConnected else { return }
-
+            guard let this = self, this.status == .connecting || this.status == .notConnected else {
+                handler?()
+                return
+            }
+            
             this.status = .disconnected
             this.leaveNamespace()