/**
 * compare two semver version strings, returning -1, 0, or 1
 *
 * The return value can be fed straight into [].sort.
 *
 * @param {string} version1 semver version 1
 * @param {string} version2 semver version 2
 * @returns {number} 1 if version 1 is highest, 0 if equal and -1 if version 2 is highest
 */
export declare function semverCompare(version1: string, version2: string): -1 | 0 | 1;