Order use-statements alphabetically

Author: tvdijen

src/Registry/ElementRegistry.php

@@ -4,8 +4,8 @@
 
 namespace SimpleSAML\XML\Registry;
 
-use SimpleSAML\XML\Assert\Assert;
 use SimpleSAML\XML\AbstractElement;
+use SimpleSAML\XML\Assert\Assert;
 use SimpleSAML\XML\Exception\InvalidDOMElementException;
 use SimpleSAML\XML\Exception\IOException;
 use Symfony\Component\Finder\Finder;