q(...) -> Promise.resolve

```
find src test -name '*.js' | xargs perl -i -pe 's/\b[qQ]\(/Promise.resolve(/'
```

src/components/views/rooms/Autocomplete.js

@@ -64,7 +64,7 @@ export default class Autocomplete extends React.Component {
                 // Hide the autocomplete box
                 hide: true,
             });
-            return Q(null);
+            return Promise.resolve(null);
         }
         let autocompleteDelay = UserSettingsStore.getLocalSetting('autocompleteDelay', 200);