Animated GIF export rounding frame durations

I’ve been exporting PNG sequences and assembling aPNG’s with apngasm. 67 ms was the closest I could get to 5 frames at 60FPS, so simply assembling an aPNG with 5/60 on its relevant frames is much better. The only hitch with that is Aseprite oddly can’t even view them properly, so I have to use something else.