fix: adding lock for cancel function slices

v1/client/client.go

@@ -235,7 +235,10 @@ func (wsClient *SafeWebsocketClient) connect() error {
 
 	pingCtx, pingCancel := context.WithCancel(context.Background())
 	go wsClient.startPingTicker(pingCtx)
-	wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)
+	wsClient.mu.WriteHandler(func() error {
+		wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)
+		return nil
+	})
 
 	if wsClient.conn != nil {
 		wsClient.conn.Close()
@@ -251,7 +254,10 @@ func (wsClient *SafeWebsocketClient) connect() error {
 
 	go func() {
 		ctx, cancel := context.WithCancel(context.Background())
-		wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+		wsClient.mu.WriteHandler(func() error {
+			wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+			return nil
+		})
 		for {
 			select {
 			case <-ctx.Done():
@@ -285,7 +291,10 @@ func (wsClient *SafeWebsocketClient) connect() error {
 
 	go func() {
 		ctx, cancel := context.WithCancel(context.Background())
-		wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+		wsClient.mu.WriteHandler(func() error {
+			wsClient.cancelFuncs = append(wsClient.cancelFuncs, cancel)
+			return nil
+		})
 		for {
 			select {
 			case <-ctx.Done():