typescript.tsserverRequest is not support

as @vue/language-tool updated to v3. typescript.tsserverRequest is needed for client to sendNotification.please add this command to support it.
[typescript.tsserverRequest](https://github.com/typescript-language-server/typescript-language-server/blob/8b3a85565b6682cc237d237c8adff00dfa1be175/src/commands.ts)