chore(deps): update dependency nyc to v15.1.0

Author: renovate-bot

package-lock.json

@@ -65,7 +65,7 @@
     "nodejs-dashboard": "0.5.1",
     "nodemon": "2.0.4",
     "npm-run-all": "4.1.5",
-    "nyc": "15.0.1",
+    "nyc": "15.1.0",
     "oz": "4.0.5",
     "pact": "4.3.2",
     "proxyquire": "2.1.3",