Change Local PHP Security Checker to `composer audit`

[reivan]

https://phptherightway.com/#checking-your-dependencies-for-security-issues

From https://github.com/fabpot/local-php-security-checker:

WARNING: This repository is now archived. Use composer audit instead

[codeguy]

Thanks. Are you able to create a pull request so you receive recognition for the change? If not that's fine and I can make this change soon.

[reivan]

Done: #1034