Update README.md

Author: skovhus

README.md

@@ -22,7 +22,7 @@ We strongly recommend that you install [shellcheck][shellcheck] to enable lintin
 npm i -g bash-language-server
 ```
 
-If you encounter installation errors, ensure you have node version 8 or newer (`node --version`).
+If you encounter installation errors, ensure you have node version 12 or newer (`node --version`).
 
 ### Clients