Release v0.0.31-alpha

[NickColley]

0.0.31-alpha (Breaking release)

💥 Breaking changes:

• The govuk-file-url helper has been renamed to to govuk-image-url. If you
  are using this function in your own styles you will need to update calls to
  it. (PR #726)

• The $govuk-global-images variable has been renamed to to
  $govuk-images-path. If you are overriding this variable or using it in your
  own styles you will need to update your code to use the new variable name.
  (PR #726)

🔧 Fixes:

• Namespacing SCSS exports with 'govuk' prefix to avoid clashes with
  exports in applications consuming GOV.UK Frontend
  (PR #732)

• Fixes a bug whereby print styles were being 'rasterized' into the screen
  styles when generating the IE8 stylesheet (this is a bug in sass-mq, and has
  also been raised upstream – Don’t rasterize print queries when non-responsive sass-mq/sass-mq#111).
  (PR #726)

• Removed some duplicated CSS rules from the outputted CSS
  (PR #727)

• Fixes a bug in IE8 where the button component did not have a shadow, by
  rendering the shadow using a border for IE8 specifically – IE8 does not
  support box-shadow
  ([PR Fix a couple of IE8 issues #737])(Fix a couple of IE8 issues #737)

🆕 New features:

• Change font delivery method from Base64 encoded strings to serving WOFF2, WOFF
  and EOT files as separate HTTP requests. You will need to ensure that you are
  serving the fonts from the assets folder as part of your application.
  (PR #726)

• The font-face is now using font-display: fallback. This means that the
  fallback font (Arial) will be used if NTA doesn't download within 100ms. The
  browser will then swap to NTA as long as it loads within the short swap period.
  (PR #726)

• You can now override the helpers used to generate image and font urls, for
  example if you are using sass-rails' asset-pipeline functionality.
  You can do this by setting $govuk-image-url-function and
  $govuk-font-url-function to the name of the function(s) you wish to use.
  See src/settings/_assets.scss for more information and examples.
  (PR #733)

• Add boilerplate template, which is a Nunjucks replacement for GOV.UK Template.
  (PR #731)

🏠 Internal:

• Improve release steps, based on doing a release
  (PR #725)

• Fix majority of vulnerabilities flagged by npm audit
  (PR #712)