message: Fix registration parameters for workspace/didChangeWatchedFiles
  As workspace/didChangeWatchedFiles notifications must be registered
  with some parameters, the signature must be fixed to match this
  instead of incorrectly stating it as void.
diff: @@ -1191,7 +1191,7 @@ export namespace WillSaveTextDocumentWaitUntilRequest {
  * the client detects changes to file watched by the lanaguage client.
  */
  export namespace DidChangeWatchedFilesNotification {
  - export const type = new NotificationType<DidChangeWatchedFilesParams, void>('workspace/didChangeWatchedFiles');
  + export const type = new NotificationType<DidChangeWatchedFilesParams, DidChangeWatchedFilesRegistrationOptions>('workspace/didChangeWatchedFiles');
  }
  /**
  