`stringify-package` is deprecated

When I install `cordova-cli` version 13, i get a deprecation warning from npm for `stringify-package`:

```bash
npm warn deprecated stringify-package@1.0.1: This module is not used anymore, and has been replaced by @npmcli/package-json
```

`stringify-package`should be replaced with `@npmcli/package-json`

No file or test is named in the issue. Search the Cordova CLI dependency and package metadata for references to stringify-package, replace the deprecated package with @npmcli/package-json, and verify that installing cordova-cli no longer emits this deprecation warning.

Written by the indexing model from the issue text.