Force to use at least xmlseclibs 3.0.3 for security reasons

Author: pitbulk

composer.json

@@ -16,7 +16,7 @@
     },
     "require": {
         "php": ">=5.4",
-        "robrichards/xmlseclibs": "^3.0"
+        "robrichards/xmlseclibs": ">=3.0.3"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5 || ^7.1",