v3.3.4: fix optional param in contract client, add js/ts samples for contract client, fix e2e open interest limit test, update readme

src/contract-client.ts

@@ -50,7 +50,7 @@ export class ContractClient extends BaseRestClient {
   /** Query order book info. Each side has a depth of 25 orders. */
   getOrderBook(
     symbol: string,
-    category: string,
+    category?: string,
     limit?: number
   ): Promise<APIResponseV3<any>> {
     return this.get('/derivatives/v3/public/order-book/L2', {

src/websocket-client.ts

@@ -544,6 +544,7 @@ export class WebsocketClient extends EventEmitter {
 
   private reconnectWithDelay(wsKey: WsKey, connectionDelayMs: number) {
     this.clearTimers(wsKey);
+
     if (
       this.wsStore.getConnectionState(wsKey) !==
       WsConnectionStateEnum.CONNECTING