Fix docs typo

Fix version number in stable

Fix typo in comment. (playcanvas#972)

Fix typo in comment. (playcanvas#967)

use drawOrder when sorting draw calls for picker (playcanvas#964)

fix wrong prefiltered cubemap overriding due to skybox uniforms being…

… reset on materials (playcanvas#957)

Fix typo in comment. (playcanvas#952)

fix clearing (playcanvas#937)

Merge pull request playcanvas#934 from playcanvas/new-application-pro…

…perties

New application properties

Emulate slope-scaled depth bias on WebGL 1 (playcanvas#913)

* emulate slope-scaled depth bias on WebGL 1
* fix formula
* fix vsm