allow change of parameters for easing functions

[JanCantCode]

For most of the easing functions listed, some magic values are hardcoded into the formula, it would be cool to be able to configure them.
e.G: easeOutExpo

``function easeOutExpo(x: number): number {
return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);

}``
why especially the power of 2? why -10 * x as the exponent and not -7 or something? would be cool to be able to try around with those values a bit ;)