fix(package): update addons-linter to version 0.15.12

https://greenkeeper.io/
2016-11-29 14:17:33 +00:00 · 2016-11-29 14:17:33 +00:00 · c439f75913
--- a/package.json
+++ b/package.json
@ -7,7 +7,7 @@
    "npm": ">= 1.1.x"
  },
  "dependencies": {
-    "addons-linter": "0.15.11",
+    "addons-linter": "0.15.12",
    "clean-css": "3.4.20",
    "less": "2.7.1",
    "stylus": "0.54.5",