update config

Author: ota-meshi

lib/configs/base.js

@@ -6,7 +6,7 @@
 module.exports = {
   parser: require.resolve('vue-eslint-parser'),
   parserOptions: {
-    ecmaVersion: 2018,
+    ecmaVersion: 2020,
     sourceType: 'module',
     ecmaFeatures: {
       jsx: true

tools/update-lib-configs.js

@@ -49,7 +49,7 @@ function formatCategory(category) {
 module.exports = {
   parser: require.resolve('vue-eslint-parser'),
   parserOptions: {
-    ecmaVersion: 2018,
+    ecmaVersion: 2020,
     sourceType: 'module',
     ecmaFeatures: {
       jsx: true,