build: Update various devDependencies to latest

grunt-contrib-less: 0.11.4 -> 0.12.0
grunt-jscs: 0.7.1 -> 0.8.1
karma: 0.12.24 -> 0.12.25
q: 1.0.1 -> 1.1.1

No-op; note that the grunt-jscs change switches us from jscs 1.6.0 to
1.7.2, which provides some new options (unused in the Wikimedia preset).

Change-Id: Ibbd6a4ab8ac7f3c48f2bb7ad2aba02e286e069bd
Merge "build: Update various devDependencies to latest"