Bump libraries

Author: tvdijen

composer.json

@@ -14,13 +14,13 @@
         "ext-dom": "*",
         "ext-spl": "*",
 
-        "simplesamlphp/assert": "~1.9",
-        "simplesamlphp/xml-common": "~2.6",
-        "simplesamlphp/xml-security": "~2.2"
+        "simplesamlphp/assert": "~2.0",
+        "simplesamlphp/xml-common": "~2.7",
+        "simplesamlphp/xml-security": "~2.3"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp-test-framework": "~1.11",
-        "simplesamlphp/xml-soap": "~2.2"
+        "simplesamlphp/xml-soap": "~2.3"
     },
     "autoload": {
         "psr-4": {