chore(package): update addons-linter to version 0.15.4

https://greenkeeper.io/
2016-09-30 17:19:15 +01:00 · 2016-09-30 17:19:15 +01:00 · b779130c33
--- a/package.json
+++ b/package.json
@ -7,8 +7,8 @@
    "npm": ">= 1.1.x"
  },
  "dependencies": {
-    "addons-linter": "0.15.3",
-    "addons-linter": "0.15.3",
+    "addons-linter": "0.15.4",
+    "addons-linter": "0.15.4",
    "clean-css": "3.4.20",
    "less": "2.7.1",
    "stylus": "0.54.5",