build: Updating npm dependencies for security issues
build: Updating npm dependencies for security issues

* Updated grunt to 1.0.3, addressing:
  * https://npmjs.com/advisories/577
  * CVE-2018-3721

Change-Id: Iea9d0092a1e6e4a390e8305bbd3bb234418308c0

wikimedia/mediawiki-extensions-Arrays,wikimedia/mediawiki-extensions-Arrays