Fix tests

Author: FloEdelmann

tests/lib/configs/configs.js

@@ -5,6 +5,10 @@ const plugin = require('../../../lib/index')
 
 describe('configs', () => {
   for (const name of Object.keys(plugin.configs)) {
+    if (name.startsWith('flat/')) {
+      continue
+    }
+
     const configName = `plugin:vue/${name}`
     const eslint = new ESLint({
       overrideConfigFile: true,