Fix seeking after playback ended

Closes #282

Author: ku1ik

src/core.js

@@ -168,8 +168,8 @@ class EndedState extends State {
     await this.play();
   }
 
-  seek(where) {
-    if (this.driver.seek(where) === true) {
+  async seek(where) {
+    if (await this.driver.seek(where) === true) {
       this.core._setState('idle');
       return true;
     }

src/driver/recording.js

@@ -348,6 +348,8 @@ function recording(
 
     if (isPlaying) {
       await resume();
+    } else if (events[nextEventIndex] === undefined) {
+      onEnd();
     }
 
     return true;