message: Improve selectEnvName function arg type
  Thanks
diff: @@ -149,7 +149,7 @@ export class EnvPair {
  * - 'selection': the environment name is selected both in the begin and end part
  * - 'cursor': a multicursor is added at the beginning of the environment name is selected both in the begin and end part
  */
  - selectEnvName(selectionOrCursor: string) {
  + selectEnvName(selectionOrCursor: 'selection'|'cursor') {
  const editor = vscode.window.activeTextEditor
  if (!editor || editor.document.languageId !== 'latex') {
  return
  