/**
 * Hash an arbitrary string into four 32-bit seed words via cyrb128, so any
 * `string` seed can fully seed sfc32's 128 bits of state. A good hash here
 * matters: it decorrelates similar seeds (`"1"` vs `"2"`) so they produce
 * unrelated streams rather than near-identical ones.
 *
 * @see https://stackoverflow.com/a/47593316
 */
export declare function cyrb128(str: string): [number, number, number, number];