chore: update node to v14 (#3481)

package.json

@@ -42,7 +42,7 @@
     "@types/express": "^4.17.8",
     "@types/http-proxy": "^1.17.4",
     "@types/js-yaml": "^4.0.0",
-    "@types/node": "~12.20.7",
+    "@types/node": "^14.17.1",
     "@types/parcel-bundler": "^1.12.1",
     "@types/pem": "^1.9.5",
     "@types/proxy-from-env": "^1.0.1",
@@ -123,7 +123,7 @@
     "browser-ide"
   ],
   "engines": {
-    "node": ">= 12 <= 14"
+    "node": "= 14"
   },
   "jest": {
     "transform": {