Bump yargs from 15.1.0 to 15.3.0 in /arctic/static/arctic (#444)

Bumps [yargs](https://github.com/yargs/yargs) from 15.1.0 to 15.3.0.
- [Release notes](https://github.com/yargs/yargs/releases)
- [Changelog](https://github.com/yargs/yargs/blob/master/CHANGELOG.md)
- [Commits](yargs/yargs@v15.1.0...v15.3.0)

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arctic/static/arctic/package.json

@@ -24,7 +24,7 @@
     "sass-burger": "^1.3.1",
     "selectize": "^0.12.5",
     "sortablejs": "^1.10.2",
-    "yargs": "^15.1.0"
+    "yargs": "^15.3.0"
   },
   "devDependencies": {
     "babel-plugin-transform-es2015-modules-strip": "^0.1.1",