Update README.md

Author: Shelamkoff

README.md

@@ -16,6 +16,22 @@ dd(export_closure($closure));
 static function(string $filename) use($fileReader): string {
     return $fileReader->read($filename);
 }
-"""
 
+$closure = static fn(): string => __FILE__ ;
+
+dd(export_closure($closure));
+
+^ "static fn(): string => 'path/to/closure/filename'"
+
+class A {
+    public function call()
+    {
+        $closure = fn(): string => self::class ;
+        dd(export_closure($closure));
+    }
+}
+
+^ "fn(): string => \A::class"
+
+```