Improve server version info

editors/code/src/commands/server_version.ts

@@ -0,0 +1,9 @@
+import * as vscode from 'vscode';
+import { ServerVersion } from '../installation/server';
+import { Cmd } from '../ctx';
+
+export function serverVersion(): Cmd {
+    return () => {
+        vscode.window.showInformationMessage('rust-analyzer version : ' + ServerVersion);
+    };
+}