docs: add note for type-fest v2 compat [skip ci] (#508)

Author: pmmmwh

README.md

@@ -100,6 +100,11 @@ yarn add -D type-fest
 pnpm add -D type-fest
 ```
 
+> **:memo: Note**:
+>
+> `[email protected]` only supports Node.js v12.20 or above.
+> If you're using an older version of Node.js, please install `[email protected]`.
+
 </details>
 
 ### Usage