GOV.UK Frontend release v1.0.0

This is our first stable release. 🙌 🎉

The v1.0.0 release includes a new tabs component, contributed by @adamsilver and @trevorsaint. And some improvements to defaults in the back link and header components (thanks @web-bert).

Our releases up until now have contained mostly breaking changes, with v1.0.0 we intend to only make breaking changes where absolutely necessary to make it easier to upgrade.

We'll be announcing the GOV.UK Design System tomorrow, so if you want to start sharing GOV.UK Frontend and the Design System, please wait until then! 😄

1.0.0

🆕 New features:

• Add tabs component – thanks to @adamsilver and @trevorsaint for contributing
  (PR #776)

• Add default text for back-link component – thanks to @web-bert
  (PR #793)

• Add default container class to the header component
  (PR #807)

🔧 Fixes:

• Reduce margin-bottom on the hint when following a default or small label
  This reduces the margin-bottom of the hint by 5px after a default
  <label> or <label class="govuk-label--s">.
  (PR #806)

🏠 Internal:

• Remove instructions to login with npm, which is no longer required
  (PR #795)

• Update docs with the assistive technology we support (PR #800)

• Update docs about installing fonts (PR #802)

• Update browser support matrix
  Remove Windows Phone
  Update IE 8-10 to functional and IE 11 to compliant
  (PR #803

• Add notice about the use of html arguments in Nunjucks macros for production
  (PR #785)

• Add CHANGELOG_TEMPLATE to make changelogs easier for new contributors
  (PR #798)

• Update package README
  (PR #804)