Update styled-components to the latest version 🚀

[greenkeeper[bot]]

The dependency styled-components was updated from 3.4.10 to 4.0.0.

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.

---

Find out more about this release.

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:

[coveralls]

Pull Request Test Coverage Report for Build 19

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 66.667%

---

Totals
Change from base Build 10:	0.0%
Covered Lines:	2
Relevant Lines:	3

---

💛 - Coveralls

[greenkeeper[bot]]

• The dependency styled-components was updated from 3.4.10 to 4.0.1.

Update to this version instead 🚀

[greenkeeper[bot]]

• The dependency styled-components was updated from 3.4.10 to 4.0.2.

Update to this version instead 🚀

Release Notes for v4.0.2

• Handle an edge case where an at-rule was being supplied to the self-reference stylis plugin at an incorrect context setting, by @probablyup (see #2114)