chore(helpers/validator): added docs for validator function

lib/helpers/validator.js

@@ -16,9 +16,11 @@ var deprecatedWarnings = {};
 
 /**
  * Transitional option validator
+ *
  * @param {function|boolean?} validator - set to false if the transitional option has been removed
  * @param {string?} version - deprecated version / removed since version
  * @param {string?} message - some message with additional info
+ *
  * @returns {function}
  */
 validators.transitional = function transitional(validator, version, message) {
@@ -52,9 +54,12 @@ validators.transitional = function transitional(validator, version, message) {
 
 /**
  * Assert object's properties type
+ *
  * @param {object} options
  * @param {object} schema
  * @param {boolean?} allowUnknown
+ *
+ * @returns {object}
  */
 
 function assertOptions(options, schema, allowUnknown) {