Bump grunt-contrib-uglify from 4.0.1 to 5.0.0

Bumps [grunt-contrib-uglify](https://github.com/gruntjs/grunt-contrib-uglify) from 4.0.1 to 5.0.0.
- [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@v4.0.1...v5.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -18,7 +18,7 @@
     "grunt-contrib-clean": "2.0.0",
     "grunt-contrib-copy": "1.0.0",
     "grunt-contrib-jshint": "2.1.0",
-    "grunt-contrib-uglify": "4.0.1",
+    "grunt-contrib-uglify": "5.0.0",
     "grunt-contrib-watch": "1.1.0",
     "grunt-postcss": "0.9.0",
     "grunt-replace-regex": "1.0.3",