fix(core): fixes type error on using @authorize with @response (#38)

GH-37

Co-authored-by: akshatdubeysf <[email protected]>

Author: rohitvishwakarma-sf

src/decorators/spec-preprocessor.ts

@@ -4,6 +4,7 @@ import {AuthorizationMetadata} from '../types';
 const defaultResponse = (ctor: {name: string}, op: string) => ({
   '200': {
     description: `Return value of ${ctor.name}.${op}`,
+    content: {},
   },
 });