import type { ReleaseType } from 'semver';
/**
 * The different types of pre-releases.
 */
export declare const prereleaseTypes: ReleaseType[];
/**
 * All possible release types.
 */
export declare const releaseTypes: ReleaseType[];
/**
 * Determines whether the specified value is a pre-release.
 */
export declare function isPrerelease(value: any): boolean;
/**
 * Determines whether the specified value is a valid ReleaseType string.
 */
export declare function isReleaseType(value: any): value is ReleaseType;