remove terminating error

src/Item/Test-CredentialStoreItem.ps1

@@ -7,6 +7,10 @@ function Test-CredentialStoreItem {
         Use this cmdlet for basic checks with a single item. Check the item first with this function before
         you try to interact with it.
 
+        Breaking Change for `v1.1.0+`:
+        Test-CredentialStoreItem will return `$false` even if the store doesn't exist. We removed the terminating
+        error and replaced it with a warning message.
+
     .PARAMETER Path
         Define a custom credential store you try to read from. Without the `-Path` parameter
         `Test-CredentialStoreItem` tries to read from the default private store.
@@ -88,10 +92,10 @@ function Test-CredentialStoreItem {
         }
         else {
             $MsgParams = @{
-                ErrorAction = 'Stop'
                 Message = "The given credential store ({0}) does not exist!" -f $Path
             }
-            Write-Error @MsgParams
+            Write-Warning @MsgParams
+            return $false
         }
     }