feat(me): add currentlyPlayingTrack route

src/lib/me/MeManager.ts

@@ -103,6 +103,18 @@ export class MeManager extends Manager {
     return json as PlayerState;
   }
 
+  /**
+   * @description Get the object currently being played on the user's Spotify account.
+   * @returns {Promise} Returns a promise with the current playing information.
+   */
+  async getCurrentlyPlayingTrack(): Promise<PlayerState> {
+    const res = await this.http.get(`/v1/me/player/currently-playing`);
+
+    const json = res.data;
+
+    return json as PlayerState; 
+  }
+
   /**
    * @description Check if one or more tracks is saved in the current user's library. (required scropes: user-library-read).
    * @returns {Promise<boolean[]>} Returns a promise with the an array of booleans.