Update CHANGELOG-v3.50.md

Author: photonstorm

CHANGELOG-v3.50.md

@@ -577,6 +577,7 @@ Since v3.0.0 the Game Object `render` functions have received a parameter called
 * `Utils.Array.NumerArray` can now accept the `start` and `end` parameters in reverse order, i.e. `10, 1` will generate a number array running from 10 to 1. Internally it has also been optimized to skip string based returns.
 * `DataManager.Events.DESTROY` is a new event that the Data Manager will _listen_ for from its parent and then call its own `destroy` method when received.
 * The `Quaternion` class constructor will now default the values to `0,0,0,1` if they're not provided, making it an identity quaternion, rather than the `0,0,0,0` it was before.
+* You can now set the `ParticleEmitter.reserve` value via the emitter configuration object (thanks @vforsh)
 
 ### Bug Fixes