supporting prettier/standalone for old versions of prettier in test app

Author: Janther

test.config.js

@@ -1,5 +1,7 @@
 import path from 'node:path';
 import createEsmUtils from 'esm-utils';
+import prettier from 'prettier';
+import { satisfies } from 'semver';
 
 const { __dirname } = createEsmUtils(import.meta);
 
@@ -13,6 +15,14 @@ export default {
 
   externals: { 'fs/promises': 'fs/promises' },
 
+  resolve: {
+    alias: {
+      prettier: satisfies(prettier.version, '^2.3.0')
+        ? 'prettier/standalone.js'
+        : 'prettier/standalone'
+    }
+  },
+
   experiments: {
     asyncWebAssembly: true,
     topLevelAwait: true,