Fix flat/imports.js

Author: tamiroh

packages/eslint-config-airbnb-base/rules/flat/imports.js

@@ -1,8 +1,12 @@
 const importPlugin = require('eslint-plugin-import');
+const globals = require('globals');
 const imports = require('../imports');
 
 module.exports = {
   languageOptions: {
+    globals: {
+      ...globals.es2015,
+    },
     parserOptions: imports.parserOptions,
   },
   plugins: {