chore: bump plugin version 7.0.0-dev

[erisu]

Motivation and Context

Prepare for next major release

Description

• bump plugin version to 7.0.0-dev.
• Updated cordovaDependencies (does not include requirements)

Testing

• npm t

Checklist

• [x] 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