fix: fix: Angular v14 support

projects/angular-auth-oidc-client/src/lib/interceptor/auth.interceptor.ts

@@ -1,11 +1,15 @@
-import { HttpEvent, HttpHandler, HttpHandlerFn, HttpInterceptor, HttpInterceptorFn, HttpRequest } from '@angular/common/http';
+import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
 import { inject, Injectable } from '@angular/core';
 import { Observable } from 'rxjs';
 import { AuthStateService } from '../auth-state/auth-state.service';
 import { ConfigurationService } from '../config/config.service';
 import { LoggerService } from '../logging/logger.service';
 import { ClosestMatchingRouteService } from './closest-matching-route.service';
 
+// these types can be dropped when Angular 14 support is dropped (and imported from angular/common/http)
+declare type HttpHandlerFn = (req: HttpRequest<unknown>) => Observable<HttpEvent<unknown>>;
+declare type HttpInterceptorFn = (req: HttpRequest<unknown>, next: HttpHandlerFn) => Observable<HttpEvent<unknown>>;
+
 @Injectable()
 export class AuthInterceptor implements HttpInterceptor {
   constructor(
@@ -73,7 +77,7 @@ function interceptRequest(
 
   if (!token) {
     deps.loggerService.logDebug(matchingConfig, `Wanted to add token to ${req.url} but found no token: '${token}'`);
-    
+
     return next(req);
   }