Shell Exec can't execute command with LATIN1 encondig

[FeehGb]

Node version (or tell us if you're using electron or some other framework):

v14.17.4

ShellJS version (the most recent version/Github branch you see the bug on):

^0.8.5

Operating system:

Ubuntu 20.04

Description of the bug:

When I tried to execute a command with string in latin1 ecoding, always execute in UTF-8;

Example ShellJS command to reproduce the error:

const shell     = require('shelljs');
const Iconv = require('iconv').Iconv

const string = 'ééé'
const iconv = new Iconv('UTF-8', 'latin1');
const comando = iconv.convert(`echo ${string}`);

shell.exec(comando.toString()+'ééé  > output.txt' ,{encoding:'latin1'})

The output terminal in LATIN1 enconding

���ééé

The output terminal in UTF-8

���-ééé

[FeehGb]

I found way to execute;
I created a file with ISO-8859-1 e put the command save with .sh and execute;