chore: switch to jest for testing

test/js-import/test.js

@@ -1,6 +1,6 @@
 import {join, dirname} from "node:path";
+import {test, expect} from "@jest/globals";
 
-import test from "ava";
 import { rollup } from "rollup";
 
 import {debugPrintOutput, getCode} from "../util/index.ts";
@@ -25,7 +25,8 @@ const defaultAssetInclude = [
   '**/*.(webm|mp4)',// video
 ];
 
-test.serial('js-import', async (t) => {
+
+test('js-import', async () => {
   const bundle = await rollup({
     input: 'index.js',
     plugins: [
@@ -40,7 +41,7 @@ test.serial('js-import', async (t) => {
   });
   const code = await getCode(bundle, output);
   debugPrintOutput('js-import',code);
-  t.snapshot(code);
+  expect(code).toMatchSnapshot();
 });