relax node and iojs restrictions

[nmccready]

No description provided.

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[nmccready]

CLA was signed

[nmccready]

There is no travis.yml nor a npm test script so I have no clue why its running or failing.

[dignifiedquire]

You can ignore travis, it's not properly setup as you've seen.
Could you please change the relaxation to what is currently present in master of the main karma. That's tested and running fine without warnings on 0.8, 0.10, 0.12 and iojs@2.

[nmccready]

ok will do