Issue Type: Bug

PHP function parameters receive the exact same scope (and are therefore the same colour) whether they are classes or primitive types.

VS Code: class names should be yellow and other keywords purple, but both the Request and bool typehints are purple. They are both scoped:

storage.type.php
meta.function.parameter.typehinted.php
meta.function.parameters.php
meta.function.php
meta.class.body.php
meta.class.php
source.php
meta.embedded.block.php
text.html.php

For comparison, in Sublime, the Request typehint, which is a class name, is yellow, and the bool one is purple. Scopes are a little different in Sublime, but notably the bool typehint does not include storage.type.php:

I understand that if this is actually a bug in the grammar I should send a PR to Atom's php-language repo, but is that what's happening here? Can anyone provide some more insight or point me to where I would start working on a fix?

Thanks.

VS Code version: Code 1.44.0 (2aae1f2, 2020-04-08T08:23:56.137Z)
OS version: Darwin x64 18.7.0