chore(package): update semantic-release to version 15.14.0

Closes #73

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "karma-spec-reporter": "0.0.31",
     "npm-watch": "^0.2.0",
     "safari-launcher": "^2.0.5",
-    "semantic-release": "^6.3.2",
+    "semantic-release": "^15.14.0",
     "serve": "^6.0.2",
     "standard": "^10.0.1",
     "uglify-js": "^3.0.23"