Add "@" to the resourcePattern Regex in ResourceMatcher.php

[schluchzi]

In my case, I need to load a JS file named "sdk@0.1.26-site.compat.min.js". The regex pattern (in ResourceMatcher.php) splits the filename at the "@", so my file can't be loaded.

A concrete example: in my installation I use the "studiomitte/friendlycaptcha" extension, and this extension provides this file that contains an "@" in its name.

I think adding "@" to the regex pattern would be a good improvement, because there are also many files from jsDelivr that contain an "@" in their file path to define the version.