Bump loader-utils and @angular-devkit/build-angular

Bumps [loader-utils](https://github.com/webpack/loader-utils) to 3.2.1 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `loader-utils` from 1.2.3 to 3.2.1
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v1.2.3...v3.2.1)

Updates `@angular-devkit/build-angular` from 0.803.18 to 15.0.0
- [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/15.0.0)

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

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

package.json

@@ -33,7 +33,7 @@
     "zone.js": "~0.9.1"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.803.15",
+    "@angular-devkit/build-angular": "~15.0.0",
     "@angular/cli": "~8.3.15",
     "@angular/compiler-cli": "~8.2.12",
     "@angular/language-service": "~8.2.12",