chore(package): update semantic-release to version 15.0.2

Closes #5

Author: greenkeeper[bot]

package.json

@@ -59,7 +59,7 @@
     "jest": "^21.2.1",
     "nodemon": "^1.11.0",
     "prettier": "^1.5.3",
-    "semantic-release": "^8.2.0"
+    "semantic-release": "^15.0.2"
   },
   "jest": {
     "coverageReporters": [