New zombies, skins, emojis

lurkers.io build 156 is out!

Changelog:

* Add more emojis (premium only)
* Access 3 custom skins by rating us!
* Fix advanced physics causing items to jitter
* Add new zombie skins
* Render stars at night on desktop client
* Fix getting stuck in ladders + stairs
* Premium area is restricted on Y dimension
* Attempt to fix chat getting in the way when clicking
* Fix able to mine blocks through other blocks
* More bug fixes and improvements