Update dependency node-fetch to v2.6.1 [SECURITY]

Author: renovate-bot

package-lock.json

@@ -39,7 +39,7 @@
   "dependencies": {
     "@cljs-oss/module-deps": "1.1.1",
     "express": "4.16.4",
-    "node-fetch": "2.3.0",
+    "node-fetch": "2.6.1",
     "nodemon": "1.18.9",
     "npm-run-all": "4.1.5",
     "react": "16.7.0",