Update autoprefixer to the latest version 🚀

Version 9.0.0 of autoprefixer was just published.

Dependency	autoprefixer
Current Version	8.6.5
Type	dependency

The version 9.0.0 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.

It might be worth looking into these changes and trying to get this project onto the latest version of autoprefixer.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

Release Notes

9.0 “A Mari Usque Ad Mare”

Autoprefixer 9.0 brings Browserslist 4.0 and drops Node.js 4 support.

Breaking Changes

We removed Node.js 4 and Node.js 9 support since it doesn’t have security updates anymore.

We removed IE and “dead” browsers (without security updates) from Babel’s targets:

last 2 version
not dead
not Explorer 11
not ExplorerMobile 11
node 10
node 8
node 6

Autoprefixer Rails 9.0 dropped the RubyRacer and Sprockets 3 support.

Browserslist 4.0

Autoprefixer 9.0 uses Browserslist 4.0 to get your target browsers.

Now you use Browserslist to specify Node.js versions. Babel 7 will use Browserslist config as well.

Also, Browserslist 4.0 will warn you if you didn’t update Can I Use DB for last than 6 month.

PostCSS 7.0

Autoprefixer 9.0 uses PostCSS 7.0

FAQ and help

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).

Your Greenkeeper bot :palm_tree:

d-band / dool