test: added text encoder globally

Author: erik-perri

jest.setup.js

@@ -1,10 +1,13 @@
+import {TextDecoder, TextEncoder} from 'node:util';
 import fetch, {Request, Response} from 'node-fetch';
 import {server} from './tests/mocks';
 
 beforeAll(() => {
     global.fetch = fetch;
     global.Request = Request;
     global.Response = Response;
+    global.TextEncoder = TextEncoder;
+    global.TextDecoder = TextDecoder;
 
     // Establish API mocking before all tests.
     server.listen()