Update styled-components to the latest version 🚀

[greenkeeper]

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.

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[greenkeeper]

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

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[greenkeeper]

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

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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)

[greenkeeper]

• The dependency styled-components was updated from 3.4.10 to 4.0.3.

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Release Notes for v4.0.3

• Interpolating a styled component into a string now returns the static component selector (emotion cross-compat)

  import styled from 'styled-components';
  const Comp = styled.div</span></span> <span class="pl-s">  color: red;</span> <span class="pl-s"><span class="pl-pds">;
  </span><span class="pl-s1"><span class="pl-pse">${</span>Comp<span class="pl-pse">}</span></span><span class="pl-pds">; // .sc-hash

• Add suppressClassNameWarning prop to disable warning when wrapping a React component with styled() and the className isn't used, by @Fer0x (see #2156)

• Expose ThemeContext to enable static contextType support for React 16.6, by @imbhargav5 (see #2152)

• Filter out invalid HTML attributes from attrs, by @Fer0x (see #2133)

• Add warning if an attrs prop is a function that returns an element, by @timswalling (see #2162)

[benjaminhobbs]

Done changes needed in this update but now blocked by styled-components/jest-styled-components#191

Similar changes will also be needed in Storybook. Forgot about those in the commits above.

[greenkeeper]

• The dependency styled-components was updated from 3.4.10 to 4.1.0.

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Release Notes for v4.1.0

• Performance optimization for fully static (no function interpolation) styled-components by avoiding using ThemeConsumer since it isn't necessary, by @mxstbr (see #2166)

• Allow disabling "speedy" mode via global SC_DISABLE_SPEEDY variable, by @devrelm (see #2185)

  To make use of this, you can either set SC_DISABLE_SPEEDY in your app's entry file or use something like webpack.DefinePlugin to do it at build time:

  webpack.DefinePlugin({
    SC_DISABLE_SPEEDY: true,
  });

• Attrs can now be passed a function (see #2200); thanks @oliverlaz for providing an early PoC PR for this!

  e.g.:

  styled.div.attrs(props => ({ 'aria-title': props.title }))``;

• Fix the warnTooManyClasses dev helper not being totally dead code eliminated in production (see #2200)

• Deprecate functions as object keys for object-form attrs (see #2200)

  e.g.:

  styled.div.attrs({ 'aria-title': props => props.title })``; // bad
  styled.div.attrs(props => ({ 'aria-title': props.title }))``; // good

  Support for this will be removed in styled-components v5. The primary impetus behind this change is to eliminate confusion around basic functions vs styled-components vs React components provided as values in the object-form attrs constructor, each of which has different handling behaviors. The single outer function to receive the props and then return a props object is conceptually simpler.

• The standalone CDN build is now UMD-compliant and can be used with RequireJS, etc.

• Add pixels to unitless numbers when object interpolation is used, by @Fer0x (see #2173)

• Trying to interpolate a non-styled component into CSS is now a hard error, rather than a warning (see #2173)

[greenkeeper]

• The dependency styled-components was updated from 3.4.10 to 4.1.1.

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Release Notes for v4.1.1

• Put back the try/catch guard around a part of the flattener that sometimes receives undetectable SFCs (fixes an errant hard error in an edge case)

[jtart]

Closed in favour of #937.