Wrapper function to update PowerShell Stable and Preview channels

Update-PowerShell.ps1

#Requires -Version 7.0
function Update-PowerShell {
    [Alias('ups')]
    param (
        # THE POWERSHELL CHANNEL THAT YOU WANT TO INSTALL
        [Parameter(Mandatory = $true)]
        [ValidateSet(
            'Stable',
            'Preview'
            ErrorMessage="Value '{0}' is invalid. Please use one of: '{1}'"
        )]
        [String]
        $Channel
    )

    # STATIC PARAMETERS
    $uri = 'https://aka.ms/install-powershell.ps1'
    $params = @{
        'UseMSI' = $true
        'AddExplorerContextMenu' = $true
        'EnablePSRemoting' = $true
        'Quiet' = $true
    }
    $expression = "& {$(Invoke-RestMethod -Uri $uri)} @params"
    
    switch ($PSBoundParameters['Channel']) {
        Stable {
            Invoke-Expression -Command $expression
        }

        Preview {
            $params.Add('Preview',$true)
            Invoke-Expression -Command $expression
        }

        Default {}
    }
}