chore(connectivity_plus): update to nm version 0.6.0

[mattkae]

Description

dbus.dart had a minor version update, which meant that nm.dart needed an update, which now means that connectivity_plus can use the newest version of nm.dart

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I titled the PR using Conventional Commits.
• I did not modify the CHANGELOG.md nor the plugin version in pubspec.yaml files.
• All existing and new tests are passing.
• The analyzer (flutter analyze) does not report any problems on my PR.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate that with a ! in the title as explained in Conventional Commits).
• No, this is not a breaking change.

[ImRodry]

Hey! When can we expect to see this released? This is currently blocking my app. Thanks for your work though!

[vbuberen]

Planned for today, so stay tuned :)

[ImRodry]

Thanks a lot!