Update MySQL Package for the latest Amazon RDS support

[goldsziggy]

The latest version of the mysql npm package had an update to the Amazon Root Certificate. This issue is to request the update of the mysqljs package to inherit the updated certificates.

mysqljs package Changelog:
https://github.com/mysqljs/mysql/blob/master/Changes.md

mysqljs pull-request:
(mysqljs/mysql#2280)