adjusting build script

Author: weaverryan

.github/build-packages.php

@@ -16,5 +16,6 @@
 
 $json = preg_replace('/\n    "repositories": \[\n.*?\n    \],/s', '', $json);
 $json = rtrim(json_encode(['repositories' => $package->repositories], $flags), "\n}").','.substr($json, 1);
-file_put_contents('composer.json', $json);
+$json = preg_replace('/"symfony\/ux-twig-component": "(\^[\d]+\.[\d]+)"/s', '"symfony/ux-twig-component": "@dev"', $json);
+file_put_contents($dir.'/composer.json', $json);