Upgrade ember-cli-autoprefixer

Author: kategengler

package.json

@@ -54,7 +54,7 @@
     "ember-basic-dropdown": "^8.11.0",
     "ember-cli": "~4.12.3",
     "ember-cli-app-version": "^6.0.0",
-    "ember-cli-autoprefixer": "^1.0.0",
+    "ember-cli-autoprefixer": "^2.0.0",
     "ember-cli-babel": "^8.2.0",
     "ember-cli-dependency-checker": "^3.3.1",
     "ember-cli-deploy": "^2.0.0",