[BUG] array query params are not valid when only single item is passed

[paulish]

When we pass only 1 item as to array param express parses it as plain type (not array). As result we get validation error.

Example:

/**
 * GET /testArray
 * @param {array<string>} testParam.query.required - test array param
 * @returns {boolean} 200 - OK
 * @returns {ErrorResponse} 400 - Bad Request
 */
router.get('/testArray', validateRequest()),
  async (req, res, next) => {
     console.log(Array.from(req.query.testParam));
  }