[player] Update version(1.2.1) and release notes

docs/release-notes-player.txt

 Player
 ======
 1.2.1
-- Apply audio and video appearance properties to player
+- Apply audio and video appearance properties of the editor to the player
+- Add space for hints beneath the control bar for audios and videos
+- Save the current playback time of audio and videos
 
 1.2.0:
 - Add custom control bar for audio and video elements

package.json

@@ -2,7 +2,7 @@
   "name": "verona-modules-aspect",
   "config": {
     "editor_version": "1.6.0",
-    "player_version": "1.2.0"
+    "player_version": "1.2.1"
   },
   "scripts": {
     "ng": "ng",