build: Bump dependencies

• Add grunt-cli so that users don't need grunt-cli pre-installed globally.

• karma-coverage@0.3.0 Fixes https://github.com/karma-runner/karma-coverage/issues/24

• karma-chrome-launcher@0.1.8 Fixes https://github.com/karma-runner/karma-chrome-launcher/issues/41. This will allow our Jenkins setup to rid the CHROME_BIN hack, after all projects have updated.

• grunt-jscs@1.8.0: Addresses T90816.

Change-Id: I49eb93e590e475536bbaaa30b83ea888390190d2