fix contract symbol ticker response typo

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bybit-api",
-  "version": "3.3.7",
+  "version": "3.3.8",
   "description": "Complete & robust node.js SDK for Bybit's REST APIs and WebSockets, with TypeScript & integration tests.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",

src/contract-client.ts

@@ -71,7 +71,7 @@ export class ContractClient extends BaseRestClient {
   getSymbolTicker(
     category: UMCategory | '',
     symbol?: string
-  ): Promise<APIResponseV3<ContractListResult<ContractSymbolTicker[]>>> {
+  ): Promise<APIResponseV3<ContractListResult<ContractSymbolTicker>>> {
     return this.get('/derivatives/v3/public/tickers', { category, symbol });
   }