Replace return; yield with yield from []

This has the same effect, but looks less hacky and makes PHPStan happy.
https://phpstan.org/r/df7fcc88-1df8-428e-b675-5dc6965c34d6

Previously this was needed to work properly with output capturing.

src/Node/ModuleNode.php

@@ -353,7 +353,7 @@ final class ModuleNode extends Node
         $compiler->subcompile($this->getNode('display_end'));
 
         if (!$this->hasNode('parent')) {
-            $compiler->write("return; yield '';\n"); // ensure at least one yield call even for templates with no output
+            $compiler->write("yield from [];\n");
         }
 
         $compiler