⬆️ Set eventsource@2.0.2 on n8n-nodes-base (#3288)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-EVENTSOURCE-2823375

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

packages/nodes-base/package.json

@@ -733,7 +733,7 @@
     "cheerio": "1.0.0-rc.6",
     "chokidar": "3.5.2",
     "cron": "~1.7.2",
-    "eventsource": "^1.0.7",
+    "eventsource": "^2.0.2",
     "fast-glob": "^3.2.5",
     "fflate": "^0.7.0",
     "formidable": "^1.2.1",