chore(package): update semantic-release to version 16.0.4

Closes #29

Author: greenkeeper[bot]

package.json

@@ -62,7 +62,7 @@
     "istanbul": "^0.4.5",
     "mocha": "^6.0.0",
     "rimraf": "^2.6.2",
-    "semantic-release": "^15.9.9",
+    "semantic-release": "^16.0.4",
     "travis-deploy-once": "^5.0.2"
   },
   "dependencies": {