fix: dev/examples/zapier/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-2342118

dev/examples/zapier/package.json

@@ -15,7 +15,7 @@
     "npm": ">=5.6.0"
   },
   "dependencies": {
-    "zapier-platform-core": "11.0.1"
+    "zapier-platform-core": "11.3.1"
   },
   "devDependencies": {
     "mocha": "^5.2.0",