Update yargs to version 6.0.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

yargs just published its new version 6.0.0.

State	Update 🚀
Dependency	yargs
New version	6.0.0
Type	dependency

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 yargs.
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 22 commits .

• 23cf836 docs: fix cruft in changelog
• 99b61f4 chore(release): 6.0.0
• 92a551b chore: rename version to release
• cc1224e chore: upgrade yargs-parser (#633)
• ad3146f fix: drop lodash.assign (#641)
• 16923fe chore: add greenkeeper ignore rule for string-width, which no longer supports Node 0.10 (#634)
• 658a34c fix: for args that have skipValidation set to true, check if the parsed arg is true (#619)
• 0be7bf3 Merge pull request #636 from yargs/greenkeeper-standard-8.2.0
• 3bc3889 Merge pull request #639 from yargs/greenkeeper-es6-promise-4.0.2
• 1f98550 chore(package): update es6-promise to version 4.0.2
• 767ac9d chore(package): update standard to version 8.2.0
• 4f29de6 feat: make opts object optional for .option() (#624)
• c301f42 fix: upgrade standard, and fix appveyor config so that it works with newest standard (#607)
• 1613f27 style: clean up indentation in options block (#615)
• cbc3636 perf: defer windowWidth() to improve perf for non-help usage (#610)

There are 22 commits in total. See the full diff.

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This pull request was created by greenkeeper.io.

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[coveralls]

Coverage remained the same at 100.0% when pulling a5ff6de on greenkeeper-yargs-6.0.0 into ce268d9 on master.