fix stdio passing (#707)

Author: TylerLeonhardt

module/PowerShellEditorServices/Start-EditorServices.ps1

@@ -310,7 +310,7 @@ try {
             -AdditionalModules $AdditionalModules `
             -LanguageServiceNamedPipe $LanguageServicePipeName `
             -DebugServiceNamedPipe $DebugServicePipeName `
-            -Stdio:($TransportType -eq "Stdio")`
+            -Stdio:$Stdio.IsPresent`
             -BundledModulesPath $BundledModulesPath `
             -EnableConsoleRepl:$EnableConsoleRepl.IsPresent `
             -DebugServiceOnly:$DebugServiceOnly.IsPresent `