feat(package): update less-plugin-autoprefix to 2.0.0

Author: joshuawilson

package.json

@@ -158,7 +158,7 @@
     "karma-webpack": "4.0.0-beta.0",
     "less": "3.8.0",
     "less-loader": "4.1.0",
-    "less-plugin-autoprefix": "1.5.1",
+    "less-plugin-autoprefix": "2.0.0",
     "markdown-it": "8.4.2",
     "mini-css-extract-plugin": "0.4.1",
     "mocha": "5.2.0",