Bump grunt-nw-builder from 4.0.0-beta.0 to 4.0.0-beta.2 (#143)

Bumps [grunt-nw-builder](https://github.com/nwjs/grunt-nw-builder) from 4.0.0-beta.0 to 4.0.0-beta.2.
- [Release notes](https://github.com/nwjs/grunt-nw-builder/releases)
- [Changelog](https://github.com/nwjs/grunt-nw-builder/blob/main/CHANGELOG.md)
- [Commits](https://github.com/nwjs/grunt-nw-builder/commits)

---
updated-dependencies:
- dependency-name: grunt-nw-builder
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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