Bump test-framework

Author: tvdijen

composer.json

@@ -47,7 +47,7 @@
         "simplesamlphp/xml-common": "3.0"
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp-test-framework": "~1.11"
+        "simplesamlphp/simplesamlphp-test-framework": "~2.0"
     },
     "extra": {
         "branch-alias": {