build(deps): bump terser and @angular-devkit/build-angular

Bumps [terser](https://github.com/terser/terser) and [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies needed to be updated together.

Updates `terser` from 4.3.9 to 5.14.2
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.3.9...v5.14.2)

Updates `@angular-devkit/build-angular` from 0.803.20 to 14.2.3
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular-cli/commits/14.2.3)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
- dependency-name: "@angular-devkit/build-angular"
  dependency-type: direct:development
...

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

openvidu-testapp/package.json

@@ -22,7 +22,7 @@
         "zone.js": "0.10.2"
     }, 
     "devDependencies": {
-        "@angular-devkit/build-angular": "0.803.20", 
+        "@angular-devkit/build-angular": "14.2.8", 
         "@angular/cli": "8.3.20", 
         "@angular/compiler-cli": "8.2.14", 
         "@angular/language-service": "8.2.14",