fix!: remove extra array wrapper from passed arguments

[erisu]

Platforms affected

electron

Motivation and Context

Arguments passed to plugins were accidentally being double-wrapped. This update properly removes the wrapping so that plugin developers don't always have to read from index [0]. Additionally, other platforms did not have this double wrapping.

Description

Updated the IPC handler to expand the args that are passed to plugins.

Testing

• npm t
• cordova build electron
• cordova run electron --nobuild

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary