added move command (#585)

Co-authored-by: Max Isom <codetheweb@users.noreply.github.com>

src/services/player.ts

@@ -554,4 +554,14 @@ export default class {
       resolve(returnedStream);
     });
   }
+
+  move(from: number, to: number): void {
+
+    if (from > this.queueSize() || to > this.queueSize()){
+      throw new Error('Move index is outside the range of the queue.' )
+    }
+
+    this.queue.splice( this.queuePosition + to ,0, this.queue.splice(this.queuePosition + from, 1)[0]);
+  }
+
 }