Add proper support for multi-line PowerShell strings about child-shell HOT 6 CLOSED

ps.addCommand(`./remove-adGroupMember.ps1 -user '${user2}' -group '${groupDN}' -i ${i}`);

const powershell = require('./node-powershell');

let ps = new powershell({
    executionPolicy: 'Bypass',
    noProfile: true,
    multiLine: true
    });
    ps.on('output', output => {
        console.log(output);
    })
    ps.addCommand(`$x = @"`);
    ps.addCommand(`foo`);
    ps.addCommand(`bar`);
    ps.addCommand(`"@;`);
    ps.invoke()
    ps.addCommand(`$x | out-host`)
    ps.invoke()

let ps2 = new powershell({
    executionPolicy: 'Bypass',
    noProfile: true
}); 
ps2.addCommand(`$PSVersionTable.PSVersion`);
ps2.addCommand(`$PSVersionTable.PSEdition`);
ps2.invoke()
.then(output =>  {
    ps2.dispose();
    console.log(output);
})

const x = `$x = @"
foo
bar
"@`;
addCommand(x);

addCommand(`${x} | out-host`);

addCommand(`
$value = @"
${JSON.stringify(req.params)}
"@
`);

const powershell = require('./node-powershell');

const addThenInvokeMLCommand = (...multiLineCommand) =>{
    this.ps = new powershell({
        executionPolicy: 'Bypass',
        noProfile: true,
        multiLine: true
        });
    this.ps.on('output', output => {
        console.log(output);
    });
    this.ps.on('end', code => {
        this.ps.dispose();
    });
    multiLineCommand.forEach((line) => {
        const commandArray = line.split('\n');
        commandArray.forEach((val) => {
            this.ps.addCommand(val + `\n`);
        });        
    });
    this.ps.invoke();
}


const myJSON = {
    "name":"John",
    "age":30,
    "cars":[ "Ford", "BMW", "Fiat" ]
    }

addThenInvokeMLCommand(`
$value = @"
${JSON.stringify(myJSON)}
"@
`, `$value | out-host`);