disable configuration but still received ConfigurationRequest

there is my config for LSP client

```js
    const clientCapabilities: ClientCapabilities = {
      // Define minimal client capabilities
      workspace: {
        applyEdit: false,
        configuration: false, // disable configuration
      },
      ......
```

For reference, I tested 5.1.1, 5.1.0, and 5.0.1.

 5.1.1 and 5.1.0 ignored my configuration, but 5.0.1 and earlier worked as expected.