Update grunt-contrib-nodeunit requirement from ^1.0.0 to ^2.0.0 (#16)
Update grunt-contrib-nodeunit requirement from ^1.0.0 to ^2.0.0 (#16)

Updates the requirements on [grunt-contrib-nodeunit](https://github.com/gruntjs/grunt-contrib-nodeunit) to permit the latest version.
- [Release notes](https://github.com/gruntjs/grunt-contrib-nodeunit/releases)
- [Changelog](https://github.com/gruntjs/grunt-contrib-nodeunit/blob/master/CHANGELOG)
- [Commits](https://github.com/gruntjs/grunt-contrib-nodeunit/compare/v1.0.0...v2.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
tclindner/grunt-npm-package-json-lint