fix(core): update

ts/index.ts

@@ -72,6 +72,7 @@ export class WebRequest {
     optionsArg: {
       method: 'GET' | 'POST' | 'PUT' | 'DELETE';
       body?: any;
+      headers?: HeadersInit;
     }
   ): Promise<Response> {
     let allUrls: string[];
@@ -106,7 +107,7 @@ export class WebRequest {
     };
 
     // lets go recursive
-    const doRequest = async (urlToUse: string) => {
+    const doRequest = async (urlToUse: string): Promise<any> => {
       if (!urlToUse) {
         throw new Error('request failed permanently');
       }
@@ -115,6 +116,7 @@ export class WebRequest {
         method: optionsArg.method,
         headers: {
           'Content-Type': 'application/json',
+          ...(optionsArg.headers || {})
         },
         body: optionsArg.body,
       });