tahriabd

Hi, $subject and $comments in insert.php are vulnerables to xss attack: a remote attacker could inject à malicious javascript to corrupt user for example: `alert(1)` to correct this vulnerability you...

According to the [manifest.yml](https://github.com/cloudfoundry/php-buildpack/blob/master/manifest.yml#L1402), php-buildpack uses an old version of python. This version is obsolete and our security tool detects several CVEs. Are there plans to update the python version?