Remove Underscore

[klaussner]

check-npm-versions uses Underscore without explicitly depending on it, which causes the issue described in #18: If no other Meteor package in .meteor/packages depends on Underscore, check-npm-versions throws TypeError: Cannot read property 'forEach' of undefined.

This PR replaces the used Underscore functions (_.forEach and _.keys) with Array.prototype.forEach and Object.keys.

Fixes #18.

[benjamn]

@tmeasday How should we proceed here? This is becoming more important since underscore is much more optional in Meteor 1.6.1.

[tmeasday]

Sorry, I wasn't getting notifications for this repository.

Happy to merge and release; but is someone interested in taking over this repository? I'm not currently using the package and if as @hwillson said it is important infrastructure for the Meteor community, someone who is probably should.

[tmeasday]

@klaussner -- would you like me to add you as a maintainer / give you publish rights?

[tmeasday]

Published as 0.3.2

[hwillson]

@tmeasday I'll gladly help maintain this repo is you're interested? Thanks!

[tmeasday]

@hwillson done--and I added you as a maintainer of the package.

[hwillson]

Awesome - thanks @tmeasday!