Godot 3.1.1 - Security update and a load of bugfixes and enhancements

We recently released Godot 3.1.1 as a maintenance update in the stable 3.1 branch.

With the -stable releases we offer you the backwards compatible changes and bugfixes. However in this release we had to break some compatibility with networking due to a security issue. See the Known incompatibilities section of the blog post. If we inadvertently changed behavior for your project started with Godot 3.1-stable please report a bug.

This update brings various changes, notably:

• A security issue was reported and fixed. This change does add some API to Godot in case you need to be able to deserialize Object data. If you do not use networking in your project you should not be affected. However GDNative ABI was changed so any native plugins need to be rebuilt for 3.1.1.
  
• GLES 3 support for depth textures was fixed. This was a regression in 3.1 from 3.0.x.
  
• GLES 2 crash on older iOS devices was resolved.
  
• OS.get_unique_id() was fixed on Android.
  
• A HeightMapShape was added to the Bullet physics engine implementation.
  
• FPS snapping in the Animation player was added to the engine, along with other quality of life improvements.
  
• New audio features for 3.2 were backported.
  
• New menu options for the Sprite editor were added: "Convert to Mesh2D", "Convert to Polygon2D", "Create CollisionPolygon2D Sibling" and "Create LightOccluder2D Sibling".
  
• AnimatedSprite can now play backwards.
  
• Emission Mask was added to CPUParticles2D.
  
• GLTF2 importer fixes.
  

See the release blog post for links and some more details, and the full changelog from Git.