fix: change credentials mode from "omit" to "same-origin" when set to…

… false

Signed-off-by: Lukas Reining <[email protected]>

src/eventsource.ts

@@ -131,7 +131,7 @@ export class CustomEventSource extends EventTarget implements EventSource {
               Accept: ContentTypeEventStream,
             },
         cache: 'no-store',
-        credentials: this.withCredentials ? 'include' : 'omit',
+        credentials: this.withCredentials ? 'include' : 'same-origin',
         signal: this.abortController?.signal,
       };