Single-Value arrays passed through Remove-Null command get converted to Objects

[TriggerAu]

Revisiting #35 Issue as that code works with raw JSON, but not when you feedin objects created via the Okta PS Modules

This is the test case in the Module today and works correctly when we convert back to objects as happens at the API end

#Test case form Github
$RawNewGroupRule = [PSObject]@{
    name = "Assign users to the Sales Team"
    type = "group_rule"
    actions = [PSObject]@{ 
        assignUserToGroups = [PSObject]@{
            groupIds = [array]@('foo')
        }
    } 
}

$RawCleanedRule = Remove-NullProperties $RawNewGroupRule

$rawNewGroupRuleJSON = $RawNewGroupRule | ConvertTo-Json -Depth 10
$RawCleanedRuleJSON = $RawCleanedRule | ConvertTo-Json -Depth 10

Write-Host "Test case with raw json input"
Write-Host "-----------------------------"
Write-Host "OG:    $(($rawNewGroupRuleJSON | ConvertFrom-Json).actions.assignUserToGroups)"
Write-Host "Clean: $(($rawCleanedRuleJSON | ConvertFrom-Json).actions.assignUserToGroups)"

This is the same test case when the object is created using the API and does not maintain the integrity of the array object

$GroupRuleGroupAssignment = Initialize-OktaGroupRuleGroupAssignment -GroupIds ([array]@("foo"))
$GroupRuleAction = Initialize-OktaGroupRuleAction -AssignUserToGroups $GroupRuleGroupAssignment

$GroupRuleExpression = Initialize-OktaGroupRuleExpression -Type "urn:okta:expression:1.0" -Value "user.title=='Sales Representative'"

$GroupRuleConditions = Initialize-OktaGroupRuleConditions -Expression $GroupRuleExpression

$NewGroupRule = Initialize-OktaGroupRule -Actions $GroupRuleAction -Conditions $GroupRuleConditions -Name "TEST_OktaAPI" -Type "group_rule"

$CleanedRule = Remove-NullProperties $NewGroupRule

$groupRuleJSON = $NewGroupRule | ConvertTo-Json -Depth 10
$cleanedRuleJSON = $CleanedRule | ConvertTo-Json -Depth 10

Write-Host "Test case with Okta method creation"
Write-Host "-----------------------------"
Write-Host "OG:    $(($groupRuleJSON | ConvertFrom-Json).actions.assignUserToGroups)"
Write-Host "Clean: $(($cleanedRuleJSON | ConvertFrom-Json).actions.assignUserToGroups)"

This is caused by some piping in the 1Remove-NullProperties` Ill post a PR in a few minutes