Update Mockttp for HTTP/2 support

Author: pimterry

package-lock.json

@@ -48,7 +48,7 @@
     "graphql": "^14.0.2",
     "graphql-yoga": "^1.18.1",
     "lodash": "^4.17.19",
-    "mockttp": "^0.20.4",
+    "mockttp": "^0.21.0",
     "node-fetch": "^2.6.0",
     "node-forge": "^0.9.0",
     "node-gsettings-wrapper": "^0.5.0",

package.json

@@ -73,6 +73,8 @@ describe('Integration test', function () {
             serverProcess.stderr!.on('data', (d) => {
                 // Some nodes warn about fs.promises - ignore it.
                 if (d.toString().includes('ExperimentalWarning: The fs.promises API')) return;
+                // We use _stream_wrap, in some node versions this is deprecated, for now ignore it
+                if (d.toString().includes('The _stream_wrap module is deprecated')) return;
 
                 reject();
                 stderr = stderr + d.toString();