opposite of lerp; get normalized range between two bounds
npm install unlerp

Opposite of lerp; gets the range between a lower and upper bound.
``js
var range = require('unlerp')
//result is typically between 0.0 and 1.0
var result = range(0, 50, 25) //=> 0.5
//if you want to saturate to 0.0 - 1.0
result = require('clamp')(result, 0, 1)
`
The result is not clamped.

Produces the normalized range of value between two bounds. Equivalent to:
`(value - min) / (max - min)``
MIT, see LICENSE.md for details.