Function expand

expand(n: number, min: number, max: number): number
Expand a normalized number n to the range min, max
Parameters
- n: number
  A normalized number
- min: number
  The minimum value in the range
- max: number
  The maximum value in the range
Returns number
A value within the number range
Example
```
const y = SMath.expand(0.25, 4, 6); // 4.5
```