Cron job to create partial invoice and send email of MS orders

First of all, configure cron schedule in app/code/Frans/MultiShip/etc/crontab.xml
Then execute ./bin/magento cron:run
Make sure table `cron_schedule` has rows with job_code='multiship_shipment_email_cron'

Each cron execution will create logging rows into table `frans_ship_email_log`