Update commitizen to the latest version 🚀

[greenkeeper]

Version 2.9.3 of commitizen just got published.

Dependency	commitizen
Current Version	2.9.2
Type	devDependency

The version 2.9.3 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of commitizen.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

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Release Notes

v2.9.3

2.9.3 (2016-12-29)

Bug Fixes

• package: "main" property within "package.json" (#409) (2915827a)

Commits

The new version differs by 8 commits .

• 2915827 fix(package): "main" property within "package.json" (#409)
• 852d6f6 style: Add linting using eslint (#406)
• 6d282be ci(appveyor): remove appveyor on finish script
• f9a78e3 ci(appveyor): disable collection of artifacts
• a655308 ci(tests): on windows run tests as node4/npm3
• 02021b9 ci(travis): update semantic-release to 6.3.5 and update travis config
• 9e88876 chore(package): update nyc to version 10.0.0 (#392)
• ca32961 docs(install): Add documentation for installing and running locally (#300)

See the full diff.

Not sure how things should work exactly?

There is a collection of frequently asked questions and of course you may always ask my humans.

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