[ImgBot] Optimize images

*Total -- 1,007.57kb -> 785.77kb (22.01%)

/resources/kolosal.iconset/icon_256x256@2x.png -- 277.91kb -> 205.83kb (25.94%)
/resources/kolosal.iconset/icon_512x512.png -- 277.92kb -> 206.17kb (25.82%)
/resources/kolosal.iconset/icon_128x128@2x.png -- 89.61kb -> 68.60kb (23.45%)
/resources/kolosal.iconset/icon_256x256.png -- 89.47kb -> 68.69kb (23.23%)
/resources/kolosal.iconset/icon_128x128.png -- 32.64kb -> 26.22kb (19.65%)
/resources/dmg_background.png -- 229.15kb -> 200.69kb (12.42%)
/resources/kolosal.iconset/icon_32x32@2x.png -- 10.87kb -> 9.57kb (11.92%)

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Author: ImgBotApp