fix for settings.set subsequent updates

By cloning the value the assert.deepEqual will now fail even for subsequent updates of the value without restarting Node-RED

packages/node_modules/@node-red/runtime/lib/settings.js

@@ -87,7 +87,7 @@ var persistentSettings = {
             throw new Error(log._("settings.not-available"));
         }
         var current = globalSettings[prop];
-        globalSettings[prop] = value;
+        globalSettings[prop] = clone(value);
         try {
             assert.deepEqual(current,value);
             return when.resolve();