Upped to new release for janus 1.15.0

Author: oharsta

composer.json

@@ -9,7 +9,7 @@
     ],
     "require": {
         "simplesamlphp/simplesamlphp": "1.9.0",
-        "janus-ssp/janus": "1.14.0",
+        "janus-ssp/janus": "1.15.0",
         "dbpatch/dbpatch": "1.1.1"
     },
     "scripts": {