add getter to event req & res object in default handler.#2381

dphang merged 2 commits intoserverless-nextjs:masterserverless-nextjs/serverless-next.js:masterfrom

KensukeTakahara:getter_function_for_http_base_class_in_default_handlerKensukeTakahara/serverless-next.js:getter_function_for_http_base_class_in_default_handlerCopy head branch name to clipboard