/// <reference types="node" />
import { SpawnOptions } from 'child_process';
/**
 * Spawns a child process to run the specified command. When there is a non-zero exit code, and there has been
 * output to `stderr` the resulting promise will throw and must be caught by the caller.
 *
 * @returns {Promise<string>}
 */
export declare function execP(command: string, params?: string[], options?: SpawnOptions): Promise<string>;