chore(package): update semantic-release to version 15.9.11

Closes #32

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
   ],
   "devDependencies": {
     "@types/jest": "23.1.5",
-    "semantic-release": "15.7.2",
+    "semantic-release": "15.9.11",
     "@types/jest": "23.1.1",
     "@types/lodash": "4.14.112",
     "@types/node": "^10.3.5",