message: fix test suite for core-types
diff: /* eslint-env node */
  const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
  +var CssImport = require('postcss-import');
  +var CssNext = require('postcss-cssnext');
  module.exports = function(defaults) {
  var app = new EmberAddon(defaults, {
  - // Add options here
  + postcssOptions: {
  + compile: {
  + enabled: true,
  + plugins: [
  + { module: CssImport },
  + { module: CssNext }
  + ]
  + }
  + }
  });
  /*
  