PHP8: remove disable entity loader

[glaubinix]

See https://www.php.net/manual/en/function.libxml-disable-entity-loader.php

[codedino]

@judith @douglasmiller Our company is planning to upgrade to php 8, and when we tested it on Staging this deprecation message was reported.

We will really appreciate it if your team were to review the php 8 support for this package.

Thank you very much in advance.

[codedino]

@cyberxander90 can you please take a look ?

[eojthebrave]

Just chiming in to say that I've run into this same issue, and the fix here works for me.

[raffishtenant]

Same, and agreed, that fix appears to address the problem for PHP 8.