fix XUnit reporter output. Closes #97

[burreo]

see mocha issue mochajs/mocha#2584

[daffl]

Due to the ^, that version should be installed automatically if you reinstall with a clean npm cache.

[burreo]

@daffl I tried this but its still pulling a mocha 2.5.3.
Since testee doesn't work with that combinationaccordign to the doumentation here https://github.com/bitovi/testee#ci-integration, can't we not reference the higher version?

[daffl]

True. I always thought migrating to a higher version would require more effort since it is using some internals but it looks like the tests are passing.

[daffl]

Thank you! Released as 0.3.0 (final)

[burreo]

Thank you!