refactor: support TypeScript 5.7 for Deno 2.2 (#3939)

* refactor: support TypeScript 5.7 for Deno 2.2

* remove `Buffer` test

runtime-tests/deno/hono.test.ts

@@ -34,13 +34,3 @@ Deno.test('environment variables', () => {
   const { NAME } = env<{ NAME: string }>(c)
   assertEquals(NAME, 'Deno')
 })
-
-Deno.test('Buffers', async () => {
-  const app = new Hono().get('/', async (c) => {
-    return c.body(Buffer.from('hello'))
-  })
-
-  const res = await app.request('/')
-  assertEquals(res.status, 200)
-  assertEquals(await res.text(), 'hello')
-})

src/helper/websocket/index.ts

@@ -40,7 +40,7 @@ export type WSReadyState = 0 | 1 | 2 | 3
  * An argument for WSContext class
  */
 export interface WSContextInit<T = unknown> {
-  send(data: string | ArrayBuffer, options: SendOptions): void
+  send(data: string | ArrayBuffer | Uint8Array, options: SendOptions): void
   close(code?: number, reason?: string): void
 
   raw?: T

src/utils/jwt/jwt.ts

@@ -22,7 +22,8 @@ import type { JWTPayload } from './types'
 import { utf8Decoder, utf8Encoder } from './utf8'
 
 const encodeJwtPart = (part: unknown): string =>
-  encodeBase64Url(utf8Encoder.encode(JSON.stringify(part))).replace(/=/g, '')
+  encodeBase64Url(utf8Encoder.encode(JSON.stringify(part)).buffer).replace(/=/g, '')
+
 const encodeSignaturePart = (buf: ArrayBufferLike): string => encodeBase64Url(buf).replace(/=/g, '')
 
 const decodeJwtPart = (part: string): TokenHeader | JWTPayload | undefined =>