Switch from grunt-requirejs to grunt-contrib-requirejs

[sindresorhus]

Author of grunt-requirejs is unresponsive and the task is huge and buggy. We also don't really need any of the extra stuff.

https://github.com/asciidisco/grunt-requirejs
https://github.com/gruntjs/grunt-contrib-requirejs

@kevva @passy can you think of any reason not to do this?

[passy]

I'm not too familiar with the tasks, but grunt-requirejs seems to have a lot of features that the contrib version doesn't have yet. If we don't use it though, we should probably switch.

[sindresorhus]

Most of what it provides extra should really be separate tasks, and I'm sure there already are by someone else. Since it's just grunt people are free to switch if they need any of it, but as default it should be something light and maintained.

[addyosmani]

@sindresorhus is the only change required for this switching out the deps we're pulling in or is there more to it than that? I would be tempted to ask on @yeoman if anyone is opposed to the change as I feel we don't (yet) have a good feel for what task features our RequireJS users care about.

[sindresorhus]

@addyosmani they don't lose anything of RequireJS, just some useless stuff like being able to change r.js version. It's already switched.