Humans: Milestone v1.3 released, major improvements.

Godot 3.4 was recently released, and it comes with several new features and also with performance improvement. I decided to build this game using Godot 3.4 and also do some small fixes.

Those are the changes the v1.3 brings:

• Minor changes to the code to be compatible with Godot 3.4.
  
• Added a new Puzzle, Crazy Operation v2 (Crazy Operation v1 wasn't even being used).
• Increased the light a little bit.
• Godot 3.4 itself brings a good performance improvement, game runs better now.
• Minor changes and fixes.

Hope you guys enjoy the new version.