Update README with commands

Author: ericdallo

README.md

@@ -149,6 +149,14 @@ matching names.
 
 You can also open the [Dart DevTools](https://dart.dev/tools/dart-devtools) on the current debug session with `lsp-dart-open-devtools`.
 
+### Commands
+
+`lsp-dart`support running Flutter and Dart commands as following:
+
+`lsp-dart-pub-get` - Run `pub get` or `flutter pub get` on project root.
+`lsp-dart-pub-upgrade` - Run `pub upgrade` or `flutter pub upgrade` on project root.
+`lsp-dart-pub-outdated` - Run `pub outdated` or `flutter pub outdated` on project root.
+
 ###### :warning:* Features only available for Dart SDK version 2.8.0 or above.
 
 ## Supported settings