stdio should only launch language service not debug (#710)

Author: TylerLeonhardt

module/PowerShellEditorServices/PowerShellEditorServices.psm1

@@ -116,6 +116,8 @@ function Start-EditorServicesHost {
 
     if ($DebugServiceOnly.IsPresent) {
         $editorServicesHost.StartDebugService($debugServiceConfig, $profilePaths, $false);
+    } elseif($Stdio.IsPresent) {
+        $editorServicesHost.StartLanguageService($languageServiceConfig, $profilePaths);
     } else {
         $editorServicesHost.StartLanguageService($languageServiceConfig, $profilePaths);
         $editorServicesHost.StartDebugService($debugServiceConfig, $profilePaths, $true);