Merge pull request #12 from dbo/greenkeeper/semantic-release-15.0.0

Update semantic-release to the latest version 🚀

Author: dbo

package.json

@@ -29,7 +29,7 @@
     "cz-conventional-changelog": "^2.1.0",
     "eslint": "^4.16.0",
     "mocha": "^5.0.0",
-    "semantic-release": "^12.4.1",
+    "semantic-release": "^15.0.0",
     "travis-deploy-once": "^4.3.3"
   },
   "eslintConfig": {