docs: update readme

Author: webdiscus

README.md

@@ -291,8 +291,20 @@ new RemoveEmptyScriptsPlugin({
   ]
 })
 ```
+
 [See the test case](https://github.com/webdiscus/webpack-remove-empty-scripts/blob/master/test/cases/css-entry-with-ignored-hmr/webpack.config.js).
 
+
+### Using dynamic CSS imports
+
+For dynamic CSS imports, in addition to using `RemoveEmptyScriptsPlugin()` in Webpack config, you must specify `webpackMode: "eager"`:
+
+```js
+import(/* webpackMode: "eager" */ './main.css');
+```
+
+[See the test case](https://github.com/webdiscus/webpack-remove-empty-scripts/tree/master/test/cases/css-import-dynamic).
+
 ## Testing
 
 `npm run test` will run the unit and integration tests.\

package.json

@@ -80,7 +80,7 @@
     "terser-webpack-plugin": "^5.3.14",
     "webpack": "5.102.1",
     "webpack-hot-middleware": "2.26.1",
-    "webpack-manifest-plugin": "6.0.1",
+    "webpack-manifest-plugin": "5.0.1",
     "webpack-merge": "6.0.1",
     "webpack-remove-empty-scripts": "file:dist"
   },