squfof 0.2.4

# Shanks's square forms factorization

## example
```rust
use squfof::square_form_factorization;
let n = 991 * 997;
let f = square_form_factorization(n).unwrap();
assert!(f == 991 || f == 997);
```

# Licence
AGPL-3.0-or-later