Create7DayRollingDatedBackup
    [-destFolder] <String>
    [-baseName] <String>
    [-sources] <String[]>
Creates a dated zip file in the destination folder with all the files provided as sources.
Will automatically clean any backups in the destination which are older than 7 days.
Create7DayRollingDatedBackup -destFolder "Path\To\Backups" -baseName "MyBackup" -sources ("Path1","Path2")