Update yargs to version 4.1.0 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

yargs just published its new version 4.1.0, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of yargs – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 152 commits .

• 3808fab add option short-hand for numbers
• 0f0dfa2 Merge pull request #386 from bcoe/4.x
• 0896aee Merge pull request #387 from bcoe/number-option-shorthand
• 6a860d0 fix standard nit
• cf081ea you can now specify an option shorthand for numbers
• 8087285 Merge pull request #385 from bcoe/update-changelog
• 1bfc939 yargs 4.0.0 \o/ see changelog and blog post
• 1a9f6e8 update 4.x changelog
• b738586 Merge pull request #384 from lrlna/add-number-type-opts
• 35ca21e update tests to work with yargs-parser@2.1.0
• df56c5b Merge pull request #378 from bcoe/pkg-conf
• 496f4e7 Merge pull request #382 from gajus/stack-trace-v4
• 4284145 fix cherry-picked conflict in index.js
• 92e9dc6 add number to options to documentation
• 7a3d77e add test for aliase + number usage

There are 152 commits in total. See the full diff.

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[codecov-io]

Current coverage is 10.90%

Merging #9 into master will not affect coverage as of 62a17e4

@@            master     #9   diff @@
=====================================
  Files            1      1       
  Stmts          110    110       
  Branches         0      0       
  Methods          0      0       
=====================================
  Hit             12     12       
  Partial          0      0       
  Missed          98     98       

Review entire Coverage Diff as of 62a17e4

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