wrapping_in_range 0.1.0

Wrapping arithmetic for any range
Documentation 
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Wrapping-in-range arithmetic for custom ranges via the [`WrappingInRange`] type

These arithmetic operations act just like `std`'s `.wrapping_sub()`, `.wrapping_add()`, etc. but for a custom user-provided range.

# Examples

```rust
use std::ops::Range;
use wrapping_in_range::WrappingInRange;

let w = |i: i16| WrappingInRange(i, -1..=1);

assert_eq!(
    [-2, -1, 0, 1, 2].map(|i| w(i) - 1),
    [ 0, 1, -1, 0, 1]
);
assert_eq!(
    [-2, -1, 0,  1, 2].map(|i| w(i) + 1),
    [-1,  0, 1, -1, 0]
);
```