Bump eventsource from 1.0.7 to 1.1.1

Bumps [eventsource](https://github.com/EventSource/eventsource) from 1.0.7 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/v1.0.7...v1.1.1)

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

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

package.json

@@ -37,7 +37,7 @@
     "zone.js": "~0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^15.0.0",
+    "@angular-devkit/build-angular": "^0.13.10",
     "@angular/cli": "~6.2.5",
     "@angular/compiler-cli": "^6.1.0",
     "@angular/language-service": "^6.1.0",