Use explicit arguments in PSSA PowerShell creation

Author: rjmholt

src/PowerShellEditorServices/Services/Analysis/PssaCmdletAnalysisEngine.cs

@@ -328,7 +328,7 @@ private Task<PowerShellResult> InvokePowerShellAsync(PSCommand command)
 
         private PowerShellResult InvokePowerShell(PSCommand command)
         {
-            using (var powerShell = System.Management.Automation.PowerShell.Create())
+            using (var powerShell = System.Management.Automation.PowerShell.Create(RunspaceMode.NewRunspace))
             {
                 powerShell.RunspacePool = _analysisRunspacePool;
                 powerShell.Commands = command;
@@ -443,7 +443,7 @@ private IEnumerable<string> GetPSScriptAnalyzerRules()
         /// <returns>A runspace pool with PSScriptAnalyzer loaded for running script analysis tasks.</returns>
         private static RunspacePool CreatePssaRunspacePool(out PSModuleInfo pssaModuleInfo)
         {
-            using (var ps = System.Management.Automation.PowerShell.Create())
+            using (var ps = System.Management.Automation.PowerShell.Create(RunspaceMode.NewRunspace))
             {
                 // Run `Get-Module -ListAvailable -Name "PSScriptAnalyzer"`
                 ps.AddCommand("Get-Module")