chore: fix Array.fromAsync polyfill (#3306)

scripts/build.ts

@@ -1,4 +1,6 @@
+import './polyfills.js';
 import { mkdir, readFile, writeFile } from 'node:fs/promises';
+import { isAbsolute } from 'node:path';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import { globIterate as glob } from 'glob';
 import type { PackageJson } from 'type-fest';
@@ -8,14 +10,6 @@ import dir from './utils/dir.js';
 import injectRegister from './utils/injectRegister.js';
 import loadTSConfig from './utils/loadTSConfig.js';
 import redirectURLPart from './utils/redirectURLPart.js';
-import { isAbsolute } from 'node:path';
-
-if (!('fromAsync' in Array)) {
-  const { fromAsync } = await import('array-from-async');
-  Object.defineProperty(Array, 'fromAsync', {
-    value: fromAsync,
-  });
-}
 
 const cwd = pathToFileURL(dir(process.cwd()));
 const sourceDir = new URL('src/', cwd);

scripts/polyfills.ts

@@ -0,0 +1,8 @@
+if (!('fromAsync' in Array)) {
+  const { default: fromAsync } = await import('array-from-async');
+  Object.defineProperty(Array, 'fromAsync', {
+    value: fromAsync,
+  });
+}
+
+export {};