Fix dependencies

Author: tvdijen

composer.json

@@ -15,12 +15,12 @@
 
         "simplesamlphp/assert": "~1.9",
         "simplesamlphp/xml-common": "~2.4",
+        "simplesamlphp/xml-ws-policy": "~1.0",
         "simplesamlphp/xml-wss-core": "~1.0"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp-test-framework": "~1.10",
-        "simplesamlphp/xml-soap": "~2.0",
-        "simplesamlphp/xml-ws-policy": "~1.0"
+        "simplesamlphp/xml-soap": "~2.0"
     },
     "autoload": {
         "psr-4": {