Function interpolate

interpolate(
    amount: number,
    a: Geometry.Point,
    b: Geometry.Point,
    allowOverflow?: boolean,
): Geometry.Point
Returns a relative point between two points
```
interpolate(0.5, a, b); // Halfway point between a and b
```
Alias for Lines.interpolate(amount, a, b);
Parameters
- amount: number
  Relative amount, 0-1
- a: Geometry.Point
- b: Geometry.Point
- allowOverflow: boolean = false
  If true, length of line can be exceeded for amount of below 0 and above 1.
Returns Geometry.Point
Point