Small technical update.

- [misc] Technical upgrade (new 3rd party libraries) also engine upgrade (small improvements like mute on focus lost).



Reminders
Recently Steam introduced Steam Developer Page if you follow it you will be notified each time I release a new game/expansion/etc. I strongly recommend to follow it.

In addition, if you have a moment could you please leave a Steam review of the game? It does not need to be long. It makes a big difference for an indie developer like me and increases the chance I will be making games in that style in future.