Update CHANGELOG-v3.50.md

Author: photonstorm

CHANGELOG-v3.50.md

@@ -3,6 +3,7 @@
 ### New Features
 
 * You can now run Phaser from within a Web Worker. You must use the `type: 'classic'` method and then use `importScripts('phaser.js')` within your workers, but it will no longer throw window errors and allows you access to lots of the core Phaser functions from Workers.
+* `Scenes.Events.PRE_RENDER` is a new event fired after the display list is sorted and before the Scene is rendered (thanks @samme)
 
 ### Updates
 
@@ -23,16 +24,21 @@
 * The `WebAudioSound.hasEnded` property is no longer private, but _is_ read only.
 * The `WebAudioSound.hasLooped` property is no longer private, but _is_ read only.
 * The `WebAudioSoundManager.createAudioContext` method will now use `webkitAudioContext` if defined in `window` (rather than using the polyfill) to handle audio on Safari.
+* If a loaded JSON File fails to parse it will now issue a console warning along with the file key (thanks @samme)
 
 ### Bug Fixes
 
 * `BlitterWebGLRenderer` was calling an out-dated function `setRenderDepth` instead of `addToRenderList` (thanks Harm)
+* When a loaded JSON file fails to parse, it's marked `FILE_ERRORED` and the Loader continues. Before this change the Loader would stall (thanks @samme)
+* `Math.FromPercent` silently assumed the `min` parameter to be 0. It can now be any value, allowing you to generate percentages between `min` and `max` correctly (thanks @somechris)
+* The Container and Zone Game Objects were not handling being added to the render list, causing them to fail input detection tests. Fix #5506 (thanks @rexrainbow @vforsh)
+* `IsometricWorldToTileXY` was returning a tile incorrectly offset from the given coordinates. It now returns from the expected location (thanks @veleek)
 
 ### Examples, Documentation and TypeScript
 
 My thanks to the following for helping with the Phaser 3 Examples, Docs, and TypeScript definitions, either by reporting errors, fixing them, or helping author the docs:
 
-
+@edemaine
 
 
 ## Version 3.52.0 - Crusch - 14th January 2021