Update xo to the latest version 🚀

[greenkeeper]

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The devDependency xo was updated from 0.27.2 to 0.28.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Publisher: sindresorhus
License: MIT

Release Notes for v0.28.0

New rules

• Add unicorn/string-content rule (#439) 5a22b77
• Add unicorn/prevent-abbreviations rule ba4efc9
  This rule enforces more readable code by preventing the use of certain abbreviations in favor of the full word. Not everyone knows all abbreviations. Saving a few characters are not worth making your code less readable. List of abbreviations XO prevents.

Improvements

• Add webpack option (#375) f656ee3
• Get extensions and ignores from config files (#436) 0d63c64

v0.27.2...v0.28.0

Commits

The new version differs by 6 commits.

• cf98e72 0.28.0
• d3c5399 Update dependencies
• f656ee3 Add webpack option (#375)
• 5a22b77 Add unicorn/string-content rule (#439)
• ba4efc9 Enable the unicorn/prevent-abbreviations rule
• 0d63c64 Get extensions and ignores from config files (#436)

See the full diff

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