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: Ie72ab806709d12d2f143de7da9f019b4263498fd
2 files changed