refactor: async not required

abc.ts

@@ -226,14 +226,14 @@ class AbcImpl implements Abc {
   }
 }
 
-export type handlerFunc = (c: Context) => Promise<any>;
+export type handlerFunc = (c: Context) => Promise<any> | any;
 export type middlewareFunc = (h: handlerFunc) => handlerFunc;
 
-export const NotFoundHandler: handlerFunc = async c => {
+export const NotFoundHandler: handlerFunc = c => {
   c.response.status = Status.NotFound;
   c.response.body = new TextEncoder().encode(STATUS_TEXT.get(Status.NotFound));
 };
-export const InternalServerErrorHandler: handlerFunc = async c => {
+export const InternalServerErrorHandler: handlerFunc = c => {
   c.response.status = Status.InternalServerError;
   c.response.body = new TextEncoder().encode(
     STATUS_TEXT.get(Status.InternalServerError)

abc_test.ts

@@ -25,11 +25,11 @@ const methods = [
 t("abc handler", async () => {
   const app = abc();
   app
-    .any("/string", async c => data.string)
-    .any("/html", async c => data.html)
-    .any("/json", async c => data.json)
-    .any("/undefined_0", async c => undefined)
-    .any("/undefined_1", async c => {
+    .any("/string", c => data.string)
+    .any("/html", c => data.html)
+    .any("/json", c => data.json)
+    .any("/undefined_0", c => undefined)
+    .any("/undefined_1", c => {
       c.string(data.undefined);
     })
     .start("0.0.0.0:4500");

sample/01_cat_app/cat_handler.ts

@@ -4,11 +4,11 @@ import { Context } from "https://deno.land/x/abc/mod.ts";
 let catId = 1;
 const cats = [] as Cat[];
 
-export async function findAll() {
+export function findAll() {
   return cats;
 }
 
-export async function findOne(c: Context) {
+export function findOne(c: Context) {
   const { id } = c.params as { id: string };
   return cats.find(cat => cat.id.toString() === id);
 }