New command: delete Office 365 group #309

Delete the specified Office 365 group

• command: graph o365group remove -i|--id <id> --confirm
• id: the ID of the Office 365 group to delete
• confirm: don't prompt for confirmation before deleting the specified Office 365 group
• requires connection to the Microsoft Graph (Add support for authenticating to MS Graph #10)

For more information see the Remove-PnPUnifiedGroup cmdlet