build: Bump various devDependencies to latest
build: Bump various devDependencies to latest

 grunt-contrib-uglify   3.0.1  →   3.1.0
 grunt-eslint          20.0.0  →  20.1.0
 grunt-exec             1.0.1  →   3.0.0
 grunt-stylelint        0.8.0  →   0.9.0
 karma                  1.7.0  →   1.7.1
 prismjs                1.6.0  →   1.8.3
 q                      1.5.0  →   1.5.1
 qunitjs                2.4.0  →   2.4.1

Change-Id: I5b011d987b6b7d7c577b63a8cb26430f67d51b22

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui