feat: added integration tests for saveFile method

src/index.ts

@@ -1,4 +1,5 @@
 import { OnspringClient } from './models/OnspringClient';
 import { PagingRequest } from './models/PagingRequest';
+import { SaveFileRequest } from './models/SaveFileRequest';
 
-export { OnspringClient, PagingRequest };
+export { OnspringClient, PagingRequest, SaveFileRequest };

src/models/EndpointFactory.ts

@@ -88,7 +88,7 @@ export class EndpointFactory {
     fieldId: number,
     fileId: number
   ): string {
-    return `/Files/recordId/${recordId}/fieldId/${fieldId}/fileId/${fileId}/file`;
+    return `/Files/recordId/${recordId}/fieldId/${fieldId}/fileId/${fileId}`;
   }
 
   /**