config.rb in autoprefixer-rails-6.4.1.1

- old
+ new

@@ -1,7 +1,5 @@
-require 'compass/import-once/activate'
-
 http_path       = "/"
 css_dir         = "stylesheets"
 sass_dir        = "sass"
 images_dir      = "images"
 javascripts_dir = "javascripts"
@@ -9,10 +7,13 @@
 sourcemap     = true
 output_style  = :compressed
 sass_options  = { cache: false }
 line_comments = false
 
-require 'autoprefixer-rails'
+require 'rubygems'
+require 'bundler'
+Bundler.require
+require '../../lib/autoprefixer-rails'
 
 on_stylesheet_saved do |file|
   css = File.read(file)
   map = file + '.map'
 