/**
 * Custom JSON.stringify()
 * - Not optimised for performance. Optimised for consistency!
 * - Allows returned values to be used for fingerprinting values of any type.
 * - Non-JSON-friendly values (like `null`, explicit `undefined`, symbols, functions) are converted to `{ $type: "symbol" }` style constructions.
 * - Objects with custom `toString()` properties assume that string is useful and return a value like `{ $type: "Date", value: "Wed Feb 24 2021 20:59:57 GMT+0000 (Greenwich Mean Time)" }`
 * - Object properties are sorted (by key) before output so they're always consistent.
 */
export declare function serialise(value: unknown): string;