message: Adjust misnamed `fileExtension` to `tsFileExtension` in help.
  The name used in this parameter's help appears to be the previous version of the flag which is listed directly below this in the source (`tsFileExtension`).
diff: @@ -104,7 +104,7 @@ export default class Generate extends ClientCommand {
  // typescript
  globalTypesFile: flags.string({
  description:
  - 'By default, TypeScript will put a file named "globalTypes.ts" inside the "output" directory. Set "globalTypesFile" to specify a different path. Alternatively, set "fileExtension" to modify the extension of the file, for example "d.ts" will output "globalTypes.d.ts"'
  + 'By default, TypeScript will put a file named "globalTypes.ts" inside the "output" directory. Set "globalTypesFile" to specify a different path. Alternatively, set "tsFileExtension" to modify the extension of the file, for example "d.ts" will output "globalTypes.d.ts"'
  }),
  tsFileExtension: flags.string({
  description:
  