fix site builder

Author: ota-meshi

docs/.vuepress/config.js

@@ -32,6 +32,10 @@ module.exports = {
           https: require.resolve("./shim/empty"),
           "json-schema-migrate": require.resolve("./shim/empty"),
           eslint$: path.resolve(__dirname, "./shim/eslint"),
+          "eslint-visitor-keys$": path.resolve(
+            __dirname,
+            "./shim/eslint-visitor-keys"
+          ),
           ajv: path.resolve(
             require.resolve("eslint/package.json"),
             "../node_modules/ajv"

docs/.vuepress/shim/eslint-visitor-keys/index.js

@@ -0,0 +1,6 @@
+// eslint-disable-next-line eslint-comments/disable-enable-pair -- DEMO
+/* eslint-disable node/no-unsupported-features/es-syntax -- DEMO */
+import all from "../../../../node_modules/eslint-visitor-keys/lib/index";
+
+export const { KEYS, getKeys, unionWith } = all;
+export default all;