Function isPromise

test/helpers/prepareOptions.js:14–16

(value)

 * @returns {value is Promise<EXPECTED_ANY>} true when thenable
 */
const isPromise = (value) =>
	Boolean(value) &&
	typeof (/** @type {Promise<EXPECTED_ANY>} */ (value).then) === "function";

/**
 * @param {ConfigModule} options exported config value