change req in sendRequest to unknown for now since none of the existing types seem to be correct

Author: DetachHead

types/index.d.ts

@@ -5,7 +5,7 @@
 // TypeScript Version: 2.4
 /// <reference types="node" />
 
-import { CookieList, Request, VariableScope } from  'postman-collection'
+import { CookieList, VariableScope } from  'postman-collection'
 
 declare global {
     const CONSOLE_EVENT_BASE = "execution.console.";
@@ -105,7 +105,7 @@ declare global {
         /**
          * Allows one to send request from script asynchronously.
          */
-        sendRequest(req: Request | string, callback: (...params: any[]) => any): void;
+        sendRequest(req: unknown | string, callback: (...params: any[]) => any): void;
         expect: Chai.ExpectStatic;
     }