Update normalize.css to version 6.0.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

normalize.css just published its new version 6.0.0.

State	Update 🚀
Dependency	normalize.css
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 normalize.css.
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 102 commits .

• 91f668b 6.0.0
• 4411f95 Include iOS Safari in Browser support
• eb7b5e5 Update stylelint configuration
• a562961 Update normalize.css (#661)
• dbc5f8e Fix repository's language classification on GitHub (#660)
• b5f0e9d Remove all opinionated rules (#649)
• 1da0911 Place the document heading above the html element's comment. (#639)
• 4559de0 Update homepage URL (#633)
• f06565f 5.0.0
• 3404854 Update macOS reference
• f9b42c6 Update text-size-adjust documentation
• 2b6082d Update semver strategy (#615)
• 5d728b8 More explicitly define font resets on form controls (#607)
• db6567c Merge branch 'feature/html-sectioning'
• 55ed05a Correct the display of
  in all browsers

There are 102 commits in total. See the full diff.

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