Bump popper.js from 1.16.0 to 1.16.1 in /arctic/static/arctic

Bumps [popper.js](https://github.com/FezVrasta/popper.js) from 1.16.0 to 1.16.1.
- [Release notes](https://github.com/FezVrasta/popper.js/releases)
- [Commits](https://github.com/FezVrasta/popper.js/commits)

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

arctic/static/arctic/package.json

@@ -19,7 +19,7 @@
     "jquery.are-you-sure": "^1.9.0",
     "js-yaml": "^3.13.1",
     "moment": "^2.22.2",
-    "popper.js": "^1.16.0",
+    "popper.js": "^1.16.1",
     "rimraf": "^3.0.1",
     "sass-burger": "^1.3.1",
     "selectize": "^0.12.5",