Waitting for HaxeFlixel new version a long time. When release the new version?

when lime test neko -Dnext ,it shows error:
/Users/shiji/Documents/haxelib/openfl/3,6,1/openfl/filters/ShaderFilter.hx:58: characters 23-58 : Type not found : openfl._legacy.filters.ShaderFilter
source/Main.hx:6: lines 6-13 : Defined in this class

My haxelib :
actuate: [1.8.7]
flixel-addons: 2.3.0 [2.4.1]
flixel-demos: 2.3.0 [2.4.0]
flixel-templates: 2.2.2 [2.4.1]
flixel-tools: 1.2.1 [1.3.0]
flixel-ui: [2.2.0]
flixel: [4.2.1]
haxeui: [1.8.21]
hscript: [2.0.7]
hxcpp: 3.4.49 [3.4.64]
lime-samples: 3.4.0 [4.0.1]
lime: [2.9.1]
openfl: [3.6.1] 4.8.1

Will i got the Discover HaxeFlixel ebook If pledged $15 on indiegogo now?

After stamp the sprite to another sprite, how to remove the stamp?

Can i set a filter to the Flxsprite ?

How to set a FlxSprite's(loaded a image) brightness ?

How to use extension to rate my game on ios ?
Or already has a extension ?

I notice the new version 4.1.0
Added GLSL shader support for FlxSprite, FlxTilemap, FlxBar and FlxBitmapText (#1848),
so i want to know how to use GLSL shader? Is it posseble to implement the 2D light?

This is cool. Thanks.

https://github.com/meishijie/One/blob/master/docs/图形参考/ss_9d8dfb1cdefc648443b2a664308ba38205f9357d.1920x1080.jpg

I want to ues this light ettect into my game .How to make it with haxeflixel?