Bump dependencies

Author: tvdijen

composer.json

@@ -14,11 +14,11 @@
         "ext-dom": "*",
         "ext-spl": "*",
 
-        "simplesamlphp/assert": "^1.6",
+        "simplesamlphp/assert": "~1.6.0",
         "simplesamlphp/composer-xmlprovider-installer": "~1.0.0",
         "simplesamlphp/saml2": "^5@dev",
-        "simplesamlphp/xml-security": "^1.11",
-        "simplesamlphp/xml-common": "^1.22"
+        "simplesamlphp/xml-security": "~1.12.0",
+        "simplesamlphp/xml-common": "~1.23.2"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp-test-framework": "^1.8"