/**
 * Given an array of postfix terms and operand variables, returns the result of
 * the postfix evaluation.
 *
 * @example
 *
 * ```js
 * import evaluate from '@tannin/evaluate';
 *
 * // 3 + 4 * 5 / 6 ⇒ '3 4 5 * 6 / +'
 * const terms = [ '3', '4', '5', '*', '6', '/', '+' ];
 *
 * evaluate( terms, {} );
 * // ⇒ 6.333333333333334
 * ```
 *
 * @param {string[]} postfix   Postfix terms.
 * @param {Object}   variables Operand variables.
 *
 * @return {*} Result of evaluation.
 */
export default function evaluate(postfix: string[], variables: any): any;