fix: session typing (#3899)

* fix: session typing

* fix: session typing

Author: kobenguyent

lib/session.js

@@ -19,7 +19,7 @@ const savedSessions = {};
  * @param {CodeceptJS.LocatorOrString}  sessionName
  * @param {Function | Object<string, *>}  config
  * @param {Function}  [fn]
- * @return {Promise<*> | undefined}
+ * @return {any}
  */
 function session(sessionName, config, fn) {
   if (typeof config === 'function') {