standard exiting non-zero on failure in 0.10

[searls]

Take a look at this build to see the issue:

https://travis-ci.org/testdouble/test-smells/builds/131741480

Standard clearly had a failure on all three VMs, but must have exited code 0 erroneously on Node v0.10.36. To reproduce, you can just clone the repo and check out that commit.

[feross]

We dropped 0.10 support in standard-engine.

PR to add it back: standard/standard-engine#109

[feross]

Just released standard-engine 4.0.3. If you reinstall standard it should work again.