Bump eventsource in /samples/react-custompropertypanecontrols

Bumps [eventsource](https://github.com/EventSource/eventsource) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/EventSource/eventsource/releases)
- [Changelog](https://github.com/EventSource/eventsource/blob/master/HISTORY.md)
- [Commits](https://github.com/EventSource/eventsource/compare/v1.1.0...v1.1.1)

---
updated-dependencies:
- dependency-name: eventsource
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

samples/react-custompropertypanecontrols/package-lock.json

@@ -10353,9 +10353,9 @@
       "dev": true
     },
     "eventsource": {
-      "version": "1.1.0",
-      "resolved": "https://onedrive.pkgs.visualstudio.com/_packaging/odsp-npm/npm/registry/eventsource/-/eventsource-1.1.0.tgz",
-      "integrity": "sha1-AOjKfJIQnpSw3fMtrGd9hBAoz68=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-1.1.1.tgz",
+      "integrity": "sha512-qV5ZC0h7jYIAOhArFJgSfdyz6rALJyb270714o7ZtNnw2WSJ+eexhKtE0O8LYPRsHZHf2osHKZBxGPvm3kPkCA==",
       "dev": true,
       "requires": {
         "original": "^1.0.0"