chore(deps): update dependency semantic-release to v15

Author: renovate-bot

package.json

@@ -56,7 +56,7 @@
     "cucumber-html-reporter": "4.0.1",
     "express": "4.16.2",
     "nyc": "11.4.1",
-    "semantic-release": "12.4.1",
+    "semantic-release": "15.9.17",
     "ts-node": "5.0.0",
     "typescript": "2.7.2"
   },