update tslint -> eslint

src/app/modules/songs/song/edit/edit-song.guard.ts

@@ -4,16 +4,15 @@ import {Observable} from 'rxjs';
 import {EditComponent} from './edit.component';
 
 @Injectable({
-  providedIn: 'root'
+  providedIn: 'root',
 })
 export class EditSongGuard implements CanDeactivate<unknown> {
-  canDeactivate(
+  public canDeactivate(
     component: EditComponent,
     currentRoute: ActivatedRouteSnapshot,
     currentState: RouterStateSnapshot,
-    nextState?: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
-
+    nextState?: RouterStateSnapshot
+  ): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
     return component.editSongComponent.askForSave(nextState);
   }
-
 }