Update grunt-contrib-uglify requirement from ~3.3.0 to ~4.0.1

Updates the requirements on [grunt-contrib-uglify](https://github.com/gruntjs/grunt-contrib-uglify) to permit the latest version.
- [Release notes](https://github.com/gruntjs/grunt-contrib-uglify/releases)
- [Changelog](https://github.com/gruntjs/grunt-contrib-uglify/blob/master/CHANGELOG)
- [Commits](gruntjs/grunt-contrib-uglify@v3.3.0...v4.0.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package.json

@@ -14,7 +14,7 @@
     "grunt-contrib-connect": "^1.0.2",
     "grunt-contrib-copy": "~1.0.0",
     "grunt-contrib-sass": "~1.0.0",
-    "grunt-contrib-uglify": "~3.3.0",
+    "grunt-contrib-uglify": "~4.0.1",
     "grunt-contrib-watch": "~1.0.0",
     "grunt-exec": "~1.0.1",
     "grunt-open": "0.2.3",