Added test

tests/SuperGlobalsTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Psalm\Tests;
+
+class SuperGlobalsTest extends TestCase
+{
+    use Traits\ValidCodeAnalysisTestTrait;
+
+    /**
+     * @return iterable<string,array{string,assertions?:array<string,string>,error_levels?:string[]}>
+     */
+    public function providerValidCodeParse(): iterable
+    {
+        yield 'http_response_headerIsList' => [
+            '<?php
+                /** @return list<string> */
+                function returnsList(): array {
+                    return $http_response_header;
+                }
+            ',
+            'assertions' => []
+        ];
+    }
+}