Upgrading to autoprefixer-rails 7.1 works around the following sprockets deprecation warning:
Generating...
DEPRECATION WARNING: You are using the a deprecated processor interface #<Proc:0x007fb2552d9cb8@/opt/boxen/rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/autoprefixer-rails-6.3.7/lib/autoprefixer-rails/sprockets.rb:37>.
Please update your processor interface:
https://github.com/rails/sprockets/blob/master/guides/extending_sprockets.md#supporting-all-versions-of-sprockets-in-processors
(called from install at /opt/boxen/rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/autoprefixer-rails-6.3.7/lib/autoprefixer-rails/sprockets.rb:37)
done in 1.515 seconds.
Upgrading to autoprefixer-rails 7.1 works around the following sprockets deprecation warning: