[Snyk] Upgrade autoprefixer from 9.6.0 to 9.7.4

[snyk-bot]

Snyk has created this PR to upgrade autoprefixer from 9.6.0 to 9.7.4.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 10 versions ahead of your current version.
• The recommended version was released 2 months ago, on 2020-01-14.

Release notes

Package name: autoprefixer

• 9.7.4 - 2020-01-14
  
  • Fix warning text (by @TheRusskiy).
• 9.7.3 - 2019-11-30
  
  • Fix compatibility with PostCSS Modules.
• 9.7.2 - 2019-11-18
  
  • Add -ms-user-select: element support.
  • Add funding link for npm fund.
• 9.7.1 - 2019-11-01
  
  • Avoid unnecessary transitions in prefixed selectors (by @fanich37).
  • Fix fit-content for Firefox.
• 9.7.0 - 2019-10-24
  

  

  Autoprefixer 9.7 brings AUTOPREFIXER_GRID environment variable and huge performance improvments.

  Grid Environment Variable

  Autoprefixer can add CSS Grid polyfills for IE. You need to manually enable it to prove that you understand the limits of polyfill.

  In previous versions you can enable Grid polyfill by grid: 'autoplace' option or by /* autoprefixer grid: autoplace */ control comment. But in some cases, developers were not able to use both methods. For instance, during work with Material UI’ CSS-in-JS in Create React App.

  Now Autoprefixer supports environment variable to enable CSS Grid polyfill:

  AUTOPREFIXER_GRID=autoplace npm build

  Performance Improvements

  @Knagis found that Browserslist takes 70% of the Autoprefixer time.

  

  We did a lot of improvements in Browserslist and now Autoprefixer should work much faster.

  

  Other

  • Fix Cannot read property 'grid' of undefined error
• 9.6.5 - 2019-10-14
  
  • Fix selector prefixing (by @fanich37).
• 9.6.4 - 2019-10-05
  
  • Now the real fix for 'startsWith' of undefined error.
• 9.6.3 - 2019-10-05
  
  • Fix Cannot read property 'startsWith' of undefined error.
• 9.6.2 - 2019-10-05
  
  • Fix false Replace fill to stretch warning.
• 9.6.1 - 2019-07-05
  
  • Fix -webkit-line-clamp truncating multi-line text support.
• 9.6.0 - 2019-06-03

from autoprefixer GitHub release notes

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