fix(package): update clean-css-cli to version 4.0.6

https://greenkeeper.io/
2017-02-10 10:50:56 +00:00 · 2017-02-10 10:50:56 +00:00 · ba7c441f6b
--- a/package.json
+++ b/package.json
@ -9,7 +9,7 @@
  "dependencies": {
    "addons-linter": "0.15.15",
    "clean-css": "4.0.5",
-    "clean-css-cli": "4.0.5",
+    "clean-css-cli": "4.0.6",
    "less": "2.7.2",
    "stylus": "0.54.5",
    "uglify-js": "2.7.5"