Bump saml2-module

Author: tvdijen

composer.json

@@ -33,7 +33,7 @@
 
         "simplesamlphp/assert": "~1.8.1",
         "simplesamlphp/composer-module-installer": "~1.4.0",
-        "simplesamlphp/saml2-legacy": "~4.18.1",
+        "simplesamlphp/saml2-legacy": "~4.19.1",
         "simplesamlphp/simplesamlphp": "~2.4.0"
     },
     "require-dev": {