chore(package): update semantic-release to version 12.4.0

Closes #135

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "karma-jasmine": "1.1.0",
     "karma-phantomjs-launcher": "1.0.4",
     "less": "2.7.2",
-    "semantic-release": "6.3.6",
+    "semantic-release": "12.4.0",
     "watchify": "3.9.0"
   },
   "dependencies": {}