Update $/cancelRequest to send object

[alissa-tung]

I am not sure the code formatting that you prefer, I learned from the following existed code:

this.notification<lsp.DidCloseTextDocumentParams>("textDocument/didClose", {textDocument: {uri}})

---

This fix addresses the LSP:

interface CancelParams {
	/**
	 * The request id to cancel.
	 */
	id: integer | string;
}

See https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#cancelRequest