MDL-75475 lib: Upgraded PHP CSS Parser to 8.4.0

lib/php-css-parser/Parsing/UnexpectedEOFException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Sabberworm\CSS\Parsing;
+
+/**
+ * Thrown if the CSS parser encounters end of file it did not expect.
+ *
+ * Extends `UnexpectedTokenException` in order to preserve backwards compatibility.
+ */
+class UnexpectedEOFException extends UnexpectedTokenException
+{
+}