Update dependencies - spring boot 4 and angular 21 (#10)

Co-authored-by: Florian THIERRY
Reviewed-on: #10

frontend/src/app/pages/publication-creation/publication-creation.component.ts

@@ -7,17 +7,15 @@ import { BehaviorSubject, Observable, Subscription } from "rxjs";
 import { Publication } from "../../core/rest-services/publications/model/publication";
 import { AuthenticationService } from "../../core/service/authentication.service";
 import { Author } from "../../core/rest-services/publications/model/author";
-import { CommonModule } from "@angular/common";
+
 
 @Component({
     selector: 'app-publication-creation',
-    standalone: true,
     templateUrl: './publication-creation.component.html',
     styleUrl: './publication-creation.component.scss',
     imports: [
-        CommonModule,
-        PublicationEditionComponent
-    ]
+    PublicationEditionComponent
+]
 })
 export class PublicationCreationComponent implements OnInit {
     private readonly authenticationService = inject(AuthenticationService);