test(fixRequestBody): fix broken test

Author: chimurai

test/unit/fix-request-body.spec.ts

@@ -73,7 +73,7 @@ describe('fixRequestBody', () => {
     jest.spyOn(proxyRequest, 'setHeader');
     jest.spyOn(proxyRequest, 'write');
 
-    fixRequestBody(proxyRequest, { body: { someField: 'some value' } } as Request);
+    fixRequestBody(proxyRequest, { body: { someField: 'some value' } } as Request<express.Request>);
 
     const expectedBody = querystring.stringify({ someField: 'some value' });
     expect(proxyRequest.setHeader).toHaveBeenCalledWith('Content-Length', expectedBody.length);