Update template devDependencies version

`grunt-contrib-jshint` => v0.10.0 [#](https://github.com/gruntjs/grunt-contrib-jshint/releases)
`grunt-contrib-nodeunit` => v0.3.3 [#](https://github.com/gruntjs/grunt-contrib-nodeunit/releases)
`grunt-contrib-watch` => v0.6.1 [#](https://github.com/gruntjs/grunt-contrib-watch/releases)
`load-grunt-tasks` => v0.4.0 [#](https://github.com/sindresorhus/load-grunt-tasks/releases)
`time-grunt` => v0.3.1 [#](https://github.com/sindresorhus/time-grunt/releases)
`jshint-stylish` => v0.1.5 [#](https://github.com/sindresorhus/jshint-stylish/releases)

I think this is quiet important, that's why giving a PR.