Function scalerTwoWay

scalerTwoWay(
    inMin: number,
    inMax: number,
    outMin?: number,
    outMax?: number,
    clamped?: boolean,
    easing?: (v: number) => number,
): NumberScalerTwoWay
Returns a two-way scaler
```
// Input range 0..100, output range 0..1
const s = scalerTwoWay(0,100,0,1);

// Scale from input to output
s.out(50); // 0.5

// Scale from output range to input
s.in(1); // 100
```
Parameters
- inMin: number
- inMax: number
- outMin: number = 0
- outMax: number = 1
- clamped: boolean = false
- Optionaleasing: (v: number) => number
Returns NumberScalerTwoWay