Send-PnPMail - handle attachments like Send-MgUserMail

[kasperbolarsen]

It would be very nice if the Send-PnPMail could handle attachments like Send-MgUserMail, as it will allow us to stay with PnP.PowerShell and not having to include Import-Module Microsoft.Graph.Users.Actions :-)

[gautamdsheth]

Closing as merged via #3157 , will be available in tomorrow's nightly.

Thanks