Bump rimraf from 2.6.3 to 3.0.0 in /arctic/static/arctic

Bumps [rimraf](https://github.com/isaacs/rimraf) from 2.6.3 to 3.0.0.
- [Release notes](https://github.com/isaacs/rimraf/releases)
- [Commits](isaacs/rimraf@v2.6.3...v3.0.0)

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

arctic/static/arctic/package.json

@@ -20,7 +20,7 @@
     "js-yaml": "^3.13.1",
     "moment": "^2.22.2",
     "popper.js": "^1.15.0",
-    "rimraf": "^2.6.3",
+    "rimraf": "^3.0.0",
     "sass-burger": "^1.3.1",
     "selectize": "^0.12.5",
     "sortablejs": "^1.8.4",