Merge pull request nushell#13 from aaarkid/patch-1

doc: Update readme to propose plugin quickfix

README.md

@@ -14,6 +14,8 @@ You can find some examples about how to create and use plugins in the [Nushell P
 - [nu_plugin_from_parquet](https://github.com/fdncred/nu_plugin_from_parquet): A plugin to parse parquet files into nushell data structures.
 - [nu_plugin_bio](https://github.com/Euphrasiologist/nu_plugin_bio): A bioinformatics plugin for nushell. 
 
+> If the shell freezes while registering the command, that means the plugin is using an older Nu version no longer compatible with your currect version. Consider bumping the Nu version to the latest in the `cargo.toml`, (may lead to breaking the script).
+
 ## Scripts
 You can find some examples about how to create and use scripts in the [Nushell Scripts](https://www.nushell.sh/book/scripts.html) page.