build: Updating npm dependencies

* eslint-config-wikimedia: 0.28.0 → 0.28.2
* grunt-stylelint: 0.20.0 → 0.20.1
* stylelint-config-wikimedia: 0.17.1 → 0.17.2

Change-Id: I67544788d3470af9816889b3d0ca4d5963a4f1ce
2 files changed