chore(deps): update dependency semantic-release to v15.1.6 (#5)

Author: renovate[bot]

package.json

@@ -29,7 +29,7 @@
     "git-http-backend": "^1.0.2"
   },
   "devDependencies": {
-    "semantic-release": "15.1.5",
+    "semantic-release": "15.1.6",
     "travis-deploy-once": "4.4.1"
   }
 }