/**
 * Turn the number (in string form as either hexa- or plain decimal) coming from
 * a numeric character reference into a character.
 *
 * Sort of like `String.fromCodePoint(Number.parseInt(value, base))`, but makes
 * non-characters and control characters safe.
 *
 * @param {string} value
 *   Value to decode.
 * @param {number} base
 *   Numeric base.
 * @returns {string}
 *   Character.
 */
export function decodeNumericCharacterReference(value: string, base: number): string;