Handle PHP 8 T_NAME_FULLY_QUALIFIED like PHP 7.

See following issues for more details:
- #284
- wp-cli/i18n-command#344

Author: remcotolsma

src/Utils/PhpFunctionsScanner.php

@@ -90,6 +90,11 @@ public function getFunctions(array $constants = [])
                 continue;
             }
 
+            if (defined('T_NAME_FULLY_QUALIFIED') && T_NAME_FULLY_QUALIFIED === $value[0]) {
+                $value[0] = T_STRING;
+                $value[1] = ltrim($value[1], '\\');
+            }
+
             switch ($value[0]) {
                 case T_CONSTANT_ENCAPSED_STRING:
                     //add an argument to the current function