Refactor deleteChannel method in PCastApi to return a status object instead of a Channel

src/PCastApi.ts

@@ -66,7 +66,7 @@ export class PCastApi {
   }
 
   // @deprecated - use pcastApi.channels.delete instead
-  public async deleteChannel(channelId: string): Promise<Channel> {
+  public async deleteChannel(channelId: string): Promise<{status: string}> {
     return this._channels.delete({channelId});
   }