function listDevices () {
    return execa('ioreg', ['-p', 'IOUSB', '-l'])
        .then(({ stdout }) => {
            return [...matchAll(stdout, DEVICE_REGEX)]
                .map(m => m.slice(1).reverse().join(' '));
        });
}
Gets list of connected iOS devices
@return {Promise} Promise fulfilled with list of available iOS devices