fix: support named export for cjs

Author: hardfist

exports/index.cjs

@@ -1,4 +1,7 @@
 // CommonJS wrapper
 const { ReactRefreshRspackPlugin } = require('../dist/index.js');
 
+// default export will be deprecated in next major version
 module.exports = ReactRefreshRspackPlugin;
+
+module.exports.ReactRefreshRspackPlugin = ReactRefreshRspackPlugin;

exports/index.mjs

@@ -1,5 +1,5 @@
 // ES modules wrapper
 import { ReactRefreshRspackPlugin } from '../dist/index.js';
-
+// default export will be deprecated in next major version
 export default ReactRefreshRspackPlugin;
 export { ReactRefreshRspackPlugin };