chore(package): update semantic-release to version 15.9.5

Closes #20

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "jest": "^21.2.1",
     "lint-staged": "^4.2.3",
     "prettier": "^1.7.4",
-    "semantic-release": "^6.3.6",
+    "semantic-release": "^15.9.5",
     "ts-jest": "^21.1.2",
     "tslint": "^5.0.0",
     "tslint-config-prettier": "^1.5.0",