build(deps-dev): bump eventsource from 3.0.7 to 4.0.0 (#610)

Bumps [eventsource](https://github.com/EventSource/eventsource) from 3.0.7 to 4.0.0.
- [Release notes](https://github.com/EventSource/eventsource/releases)
- [Changelog](https://github.com/EventSource/eventsource/blob/main/CHANGELOG.md)
- [Commits](EventSource/eventsource@v3.0.7...v4.0.0)

---
updated-dependencies:
- dependency-name: eventsource
  dependency-version: 4.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "glob": "11.0.2"
   },
   "devDependencies": {
-    "eventsource": "^3.0.7",
+    "eventsource": "^4.0.0",
     "fetch-mock": "^12.5.2",
     "nock": "^14.0.4",
     "nodemon": "^3.1.10",