Update request.d.ts (#12731)

adding some missing valid options to type definitions relating to query string handling

request/request.d.ts

@@ -85,6 +85,8 @@ declare module 'request' {
 			aws?: AWSOptions;
 			hawk?: HawkOptions;
 			qs?: any;
+		        qsStringifyOptions?: any;
+			qsParseOptions?: any;
 			json?: any;
 			multipart?: RequestPart[] | Multipart;
 			agent?: http.Agent | https.Agent;