how to enable`Electron --trace-warnings ...`

I use electron 15.2.0 (with sed -i 's/14.0.0/15.2.0/' node_modules/cordova-electron/lib/build/base.json )

some warning happened

how to enable`Electron --trace-warnings ...`

```
+ cd /Users/z/rmw/rmw
+ cordova run electron --nobuild --trace-warnings
(node:7748) electron: The default of nativeWindowOpen is deprecated and will be changing from false to true in Electron 15. See https://github.com/electron/electron/issues/28511 for more information.
(Use `Electron --trace-warnings ...` to show where the warning was created)
```

Reproduce the reported `cordova run electron --nobuild --trace-warnings` command with Electron 15.2.0 and inspect how the Cordova Electron CLI launches Electron. Determine whether the warning-tracing option is accepted and forwarded, and document or test the expected behavior.

Written by the indexing model from the issue text.