[CI] Fix build-packages.php

Author: OskarStark

.github/build-packages.php

@@ -9,7 +9,11 @@
 use Symfony\Component\Finder\Finder;
 
 $finder = (new Finder())
-    ->in([__DIR__.'/../src/*/'])
+    ->in([
+        __DIR__.'/../src/*/',
+        __DIR__.'/../examples/',
+        __DIR__.'/../demo/',
+    ])
     ->depth(0)
     ->name('composer.json')
 ;