Updated for current API fields

The API supports a 'PUT' for modifying parts of an asset, but most of the supported fields were missing (I need to be able to set a location for example which was missing).  I've added all the current API fields and replaced the $values section with Get-ParameterValue.  Not fully tested everything but looking good so far.

SnipeitPS/Public/Set-Asset.ps1

@@ -1,6 +1,6 @@
 <#
     .SYNOPSIS
-    Update a Asset in the Snipe-it asset system
+    Update a specific Asset in the Snipe-it asset system
 
     .DESCRIPTION
     Long description
@@ -9,13 +9,46 @@
     ID of the Asset
 
     .PARAMETER Name
-    Name of the Asset
+    Asset name
 
     .PARAMETER Status_id
     Status ID of the asset, this can be got using Get-Status
 
     .PARAMETER Model_id
     Model ID of the asset, this can be got using Get-Model
+    
+    .PARAMETER last_checkout
+    Date the asset was last checked out
+
+    .PARAMETER assigned_to
+    The id of the user the asset is currently checked out to
+
+    .PARAMETER company_id
+    The id of an associated company id
+
+    .PARAMETER serial
+    Serial number of the asset
+
+    .PARAMETER order_number
+    Order number for the asset
+
+    .PARAMETER warranty_months
+    Number of months for the asset warranty
+
+    .PARAMETER purchase_cost
+    Purchase cost of the asset, without a currency symbol
+
+    .PARAMETER purchase_date
+    Date of asset purchase
+
+    .PARAMETER requestable
+    Whether or not the asset can be requested by users with the permission to request assets
+
+    .PARAMETER archived
+    Whether or not the asset is archived. Archived assets cannot be checked out and do not show up in the deployable asset screens
+
+    .PARAMETER rtd_location_id
+    The id that corresponds to the location where the asset is usually located when not checked out
 
     .PARAMETER url
     URL of Snipeit system, can be set using Set-Info command
@@ -49,6 +82,28 @@ function Set-Asset()
         [string]$Status_id,
 
         [string]$Model_id,
+        
+        [DateTime]$last_checkout,
+
+        [int]$assigned_to,
+
+        [int]$company_id,
+
+        [string]$serial,
+
+        [string]$order_number,
+
+        [int]$warranty_months,
+
+        [double]$purchase_cost,
+
+        [DateTime]$purchase_date,
+
+        [bool]$requestable,
+
+        [bool]$archived,
+
+        [int]$rtd_location_id,
 
         [parameter(mandatory = $true)]
         [string]$url,
@@ -59,11 +114,7 @@ function Set-Asset()
         [hashtable] $customfields
     )
 
-    $Values = @{
-        "name"      = $Name
-        "status_id" = $status_id
-        "model_id"  = $model_id
-    }
+    $Values = . Get-ParameterValue
 
     if ($customfields)
     {