`winget export -o -` creates a file named `-` instead of writing to stdout

Brief description of your issue

Trying out the winget export command and whether it'd be usable for inventorying / fact reporting purposes, I noticed this issue on my first attempt at running it.

Specifying - for the output file unexpectedly creates a text file literally named - instead of writing to consoles' stdout stream.

Steps to reproduce

Run winget export -o -

Expected behavior

winget writes the package information JSON to stdout.

Actual behavior

winget writes the package information JSON to a file named -.

Environment

Windows-Paket-Manager v1.7.10582
Copyright (c) Microsoft Corporation. Alle Rechte vorbehalten.

Windows: Windows.Desktop v10.0.19045.4046
Systemarchitektur: X64
Paket: Microsoft.DesktopAppInstaller v1.22.10582.0

WinGet-Verzeichnisse
-----------------------------------------------------------------------------------------------------------------------------------------
Protokolle                                   %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\DiagOutputDir
Benutzereinstellungen                        %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\settings.json
Verzeichnis für portierbare Links (Benutzer) %LOCALAPPDATA%\Microsoft\WinGet\Links
Portables Linkverzeichnis (Computer)         C:\Program Files\WinGet\Links
Portierbarer Paketstamm (Benutzer)           %LOCALAPPDATA%\Microsoft\WinGet\Packages
Portierbarer Paketstamm                      C:\Program Files\WinGet\Packages
Portierbares Paketstamm (x86)                C:\Program Files (x86)\WinGet\Packages
Installationsprogrammdownloads               %USERPROFILE%\Downloads

Links
-----------------------------------------------------------------------------------------
Datenschutzerklärung              https://aka.ms/winget-privacy
Lizenzvereinbarung                https://aka.ms/winget-license
Hinweise von Drittanbietern       https://aka.ms/winget-3rdPartyNotice
Startseite                        https://aka.ms/winget
Windows Store-Nutzungsbedingungen https://www.microsoft.com/en-us/storedocs/terms-of-sale

Administratoreinstellung                  Status
-----------------------------------------------------
LocalManifestFiles                        Deaktiviert
BypassCertificatePinningForMicrosoftStore Deaktiviert
InstallerHashOverride                     Deaktiviert
LocalArchiveMalwareScanOverride           Deaktiviert

Start with the winget export command's handling of the -o output argument and trace how a value of - is interpreted. Verify the behavior by running winget export -o -; done means the package information JSON is written to stdout rather than a file named -.