Add notice for modern Node.js versions

Signed-off-by: Jon Koops <jonkoops@gmail.com>

README.md

@@ -17,6 +17,15 @@ with the following differences:
   * Provides the fallback list when using tools like `browserify` without pulling
     in the `http` shim module.
 
+> [!NOTE]
+> This module is largely a wrapper of [`http.METHODS`](https://nodejs.org/api/http.html#httpmethods) from Node.js core with backwards compatibility for Node.js versions older than 0.11.8, making it mostly unnecessary for use in new projects. For newer Node.js versions, the following code is equivalent to using this module:
+
+```js
+import { METHODS } from 'node:http'
+
+const methods = METHODS.map(() => method.toLowerCase())
+```
+
 ## Install
 
 This is a [Node.js](https://nodejs.org/en/) module available through the