Bump node-notifier from 6.0.0 to 8.0.1

Bumps [node-notifier](https://github.com/mikaelbr/node-notifier) from 6.0.0 to 8.0.1.
- [Release notes](https://github.com/mikaelbr/node-notifier/releases)
- [Changelog](https://github.com/mikaelbr/node-notifier/blob/v8.0.1/CHANGELOG.md)
- [Commits](mikaelbr/node-notifier@v6.0.0...v8.0.1)

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