chore(deps): update dependency nyc to v14 (#241)

Author: renovate[bot]

packages/google-cloud-dns/package.json

@@ -71,7 +71,7 @@
     "jsdoc-baseline": "git+https://github.com/hegemonic/jsdoc-baseline.git",
     "linkinator": "^1.1.2",
     "mocha": "^6.0.0",
-    "nyc": "^13.0.0",
+    "nyc": "^14.0.0",
     "power-assert": "^1.5.0",
     "prettier": "^1.13.5",
     "proxyquire": "^2.0.1",