fix: body property needed on Request Definition file

Author: muratcorlu

src/request.d.ts

@@ -4,8 +4,9 @@ import { Accepts } from 'accepts';
 import { Readable } from 'stream';
 import { IncomingMessage } from 'http';
 
-export interface Request extends IncomingMessage {
+export class Request extends IncomingMessage {
     constructor(event: APIGatewayProxyEvent);
+    body: any;
     headers: { [name: string]: string };
     hostname: string | null;
     method: string;

src/response.d.ts

@@ -2,7 +2,7 @@ import { Request } from "./request";
 import { APIGatewayProxyCallback, APIGatewayProxyResult } from 'aws-lambda';
 import { ServerResponse } from "http";
 
-export interface Response extends ServerResponse {
+export class Response extends ServerResponse {
     /**
      * Response object constructor
      *