update vitest config

Author: DamianGlowala

vitest.config.ts

@@ -1,8 +1,8 @@
-import { defineVitestConfig } from '@nuxt/test-utils/config'
+import { defineConfig } from 'vitest/config'
 
-export default defineVitestConfig({
+export default defineConfig({
   test: {
     dir: './test',
-    environment: 'nuxt',
+    environment: 'node',
   },
 })