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

Closes #40

Author: greenkeeper[bot]

package.json

@@ -117,7 +117,7 @@
     "rollup-plugin-typescript2": "^0.12.0",
     "rxjs": "^5.5.6",
     "rxjs-marbles": "^2.3.1",
-    "semantic-release": "^15.0.0",
+    "semantic-release": "^16.0.4",
     "ts-jest": "^22.0.0",
     "ts-node": "^5.0.1",
     "tslint": "^5.8.0",