Easier extension of FlxTypedTilemap and FlxTile

[Geokureli]

It's now easier to extend FlxTypedTilemap, all you need now is to override createTile, like so:

class SpecialTile extends FlxTile
{
    public var specialField:SpecialType;
    
    public function new (tilemap:SpecialTilemap, index, width, height, visible, allowCollisions)
    {
        this.specialField = Global.getSpecialValue(index);
        
        super(cast tilemap, index, width, height, visible, allowCollisions);
    }
}

class SpecialTilemap extends FlxTypedTilemap<SpecialTile>
{
    override function createTile(index, width, height, visible, allowCollisions)
    {
        return new SpecialTile(this, index, width, height, visible, allowCollisions);
    }
}

you can also use the existing method, which is to override initTileObjects and create all the tiles, there