chore(package): update semantic-release to version 17.0.4

Closes #34

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "execa": "^1.0.0",
     "jest": "^24.1.0",
     "rimraf": "^2.6.3",
-    "semantic-release": "^15.13.3",
+    "semantic-release": "^17.0.4",
     "ts-jest": "^24.0.0",
     "ts-node": "^8.0.1",
     "tslint": "^5.13.1",