Ruslan

Add segment duration getter

1

## Overview I suggest adding a getter to get the duration of a given segment [startFrame, endFrame]. ```js const player = new DotLottie({ segment: [0, 100], /* other params */...

## Overview If you first reduce the animation speed `setSpeed(0.1)`, and then (after some time) increase `setSpeed(1)`, then the animation jumps forward (as if the animation speed was always equal...