`Mint.Select-DropBlankProperty` should drop blank Dictionary/hashtables

[ninmonkey]

Output is not dropping dictionary .Parameters when blank

$t = gcm prompt | select -ExcludeProperty Definition, ScriptBlock
$t | Mint.Object.DropBlankProps | fl * -Force 

CmdletBinding      : False
CommandType        : Function
Name               : prompt
Options            : None
Parameters         : {}
RemotingCapability : PowerShell
Visibility         : Public

It is type Dictionary<2>