chore(package): update semantic-release to version 15.0.1

Closes #33

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "eslint-plugin-react": "^7.0.0",
     "husky": "^0.14.1",
     "jest": "^20.0.0",
-    "semantic-release": "^6.3.2"
+    "semantic-release": "^15.0.1"
   },
   "repository": {
     "type": "git",