Changes
- fixed #2 minimum php version is upto 7.1.0
- fixed #3 add namesapce (oops\Encrypt\mysqlAES)
- fixed #5 don't use mcrypt api any more.
Notes
For backward compatibility with PHP 7.0.0 and before, use the 1.x branch. 2.x branch is available in PHP 7.1.0 and later.
