A cubic animation curve that starts slowly and ends quickly. This curve is
based on a quintic equation where
f(t) = t⁵.
Compared to Curves.easeInQuart, this curve is slightly steeper.
Derived from Robert Penner’s easing functions.
static const Cubic easeInQuint = Cubic(0.755, 0.05, 0.855, 0.06);