/**
 * Reads the newest version of one npm package.
 *
 * Note: `$` is used to indicate that this function is not a pure function - it queries the npm registry
 *
 * @returns The newest published version or `null` when the registry could not be reached
 * @private internal utility of `promptbookCli`
 */
export declare function $resolveLatestNpmPackageVersion(npmPackageName: string): Promise<string | null>;