some missing types

package.json

 {
   "name": "koishi-nestjs",
-  "version": "1.0.9",
+  "version": "1.0.11",
   "description": "Koishi.js as Nest.js Module",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
@@ -39,6 +39,9 @@
   "devDependencies": {
     "@nestjs/common": "^8.0.9",
     "@nestjs/core": "^8.0.9",
+    "@types/koa": "^2.13.4",
+    "@types/koa__router": "^8.0.8",
+    "@types/koa-bodyparser": "^4.3.3",
     "@types/node": "^16.10.2",
     "@typescript-eslint/eslint-plugin": "^4.32.0",
     "@typescript-eslint/parser": "^4.32.0",
@@ -55,6 +58,8 @@
   "dependencies": {
     "@koa/router": "^10.1.1",
     "http-proxy-middleware": "^2.0.1",
-    "koa": "^2.13.3"
+    "koa": "^2.13.3",
+    "koa-body-parser": "^1.1.2",
+    "koa-bodyparser": "^4.3.0"
   }
 }

src/koishi.service.ts

@@ -11,6 +11,7 @@ import { KoishiModuleOptions } from './koishi.interfaces';
 import { Server } from 'http';
 import Koa from 'koa';
 import KoaRouter from '@koa/router';
+import KoaBodyParser from 'koa-bodyparser';
 
 @Injectable()
 export class KoishiService
@@ -27,6 +28,7 @@ export class KoishiService
     this.router = new KoaRouter();
     this._nestKoaTmpInstance.use(this.router.routes());
     this._nestKoaTmpInstance.use(this.router.allowedMethods());
+    this._nestKoaTmpInstance.use(KoaBodyParser());
   }
 
   _nestKoaTmpInstance = new Koa();