Add .d.ts for TypeScript compatibility (#401)

* Add .d.ts for TypeScript compatibility

* Make json method return any

packages/micro/micro.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="node" />
+
+import { RequestListener, IncomingMessage, ServerResponse } from 'http'
+
+export type RequestHandler = (req: IncomingMessage, res: ServerResponse) => any
+declare function serve(fn: RequestHandler): RequestListener
+
+export function run(req: IncomingMessage, res: ServerResponse, fn: RequestHandler): Promise<void>
+export function json(req: IncomingMessage, info?: { limit?: string | number, encoding?: string }): Promise<any>
+export function text(req: IncomingMessage, info?: { limit?: string | number, encoding?: string }): Promise<string>
+export function buffer(req: IncomingMessage, info?: { limit?: string | number, encoding?: string }): Promise<Buffer | string>
+export function send(res: ServerResponse, code: number, data?: any): Promise<void>
+export function createError(code: number, msg: string, orig?: Error): Error & { statusCode: number, originalError?: Error }
+export function sendError(req: IncomingMessage, res: ServerResponse, info: { statusCode?: number, status?: number, message?: string, stack?: string }): Promise<void>
+export default serve

packages/micro/package.json

@@ -4,9 +4,11 @@
   "description": "Asynchronous HTTP microservices",
   "license": "MIT",
   "main": "./lib/index.js",
+  "types": "./micro.d.ts",
   "files": [
     "bin",
-    "lib"
+    "lib",
+    "micro.d.ts"
   ],
   "bin": {
     "micro": "./bin/micro.js"