Update xo to version 0.17.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

xo just published its new version 0.17.0.

State	Update 🚀
Dependency	xo
New version	0.17.0
Type	devDependency

This version 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 xo.
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.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

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The new version differs by 25 commits .

• 1607c3f 0.17.0
• 517cd3c add Highlights section
• 9bf80fa bump dependencies
• afc03ef add some new eslint-plugin-ava rules
• c17358b cleanup #142
• 519ad1b cleanup #147
• 85c6094 Add settings and parser options (#142)
• fa99f36 Ignore paths from .gitignore (#147)
• 8933f51 Skip package.json files with "xo": false (#151)
• 3c42847 Add extensions option (#149)
• 8829b33 improve error message when extended config doesn't existn
• a00cf57 fix some lint issues
• ac03fee use 'error' instead of 2 in the rule configs
• e8b0a30 upgrade to eslint-plugin-import@2
• 4c797d8 ES2015ify

There are 25 commits in total. See the full diff.