PHPCS 3.x compat: Add autoload directive for the alias file
PHPCS 3.x compat: Add autoload directive for the alias file

The `<autoload>` ruleset directive was added in PHPCS 3.0.1 in response to issue squizlabs/PHP_CodeSniffer#1469

WPTRT/WordPress-Coding-Standards,WPTRT/WordPress-Coding-Standards,WPTRT/WordPress-Coding-Standards,WPTRT/WordPress-Coding-Standards,WPTRT/WordPress-Coding-Standards