Allow multipleOf and divisibleBy to accept decimal values (up to 3 after comma)

[unity]

Fixes the case when multipleOf or divisibleBy are set to decimal values such as 0.3.
Those are valid use cases, for instance when setting a slider with Opacity, where you want to stick to increments of 0.1

Updated Tests attached

[jdorn]

This doesn't get at the core problem of floating point numbers in javascript. For example, in javascript 1.14 / 0.01 is equal to 113.9999999999. Multiplying by 1000 just pushes the problem out a little further. I think PR #436 is more on the right track of adding math.js as an optional dependency and using that if available.