esm migration for tests

.mocharc.js

@@ -1,8 +1,6 @@
-'use strict';
+import "ts-node/register";
 
-require("ts-node/register");
-
-module.exports = {
+export default {
   diff: true,
   extension: ['ts'],
   package: '../package.json',

test/decode-blob.test.ts

@@ -18,8 +18,6 @@ import { encode, decode, decodeAsync } from "../src/index.ts";
       this.skip();
     }
 
-    // use any because the type of Blob#stream() in @types/node does not make sense here.
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
-    assert.deepStrictEqual(await decodeAsync(blob.stream() as any), "Hello!");
+    assert.deepStrictEqual(await decodeAsync(blob.stream()), "Hello!");
   });
 });

test/readme.test.ts

@@ -1,5 +1,5 @@
 import { deepStrictEqual } from "assert";
-import { encode, decode } from "../src/index";
+import { encode, decode } from "../src/index.ts";
 
 describe("README", () => {
   context("## Synopsis", () => {