feat(progress): add minimum percent change needed to trigger an animation

[meowgorithm]

This update adds a threshold which prevents progress meters from animating over very short distances. Because terminal cells are rather large units, it's often a better experience to have short progress bar increments happen instantly.

[caarlos0]

👀

[meowgorithm]

This is stale and trivial to re-implement if it's still needed. Closing.