The following entities have had Max Passengers bumped up from 12 to 13:

SHIPS:

• PB-950 Patrol Boat
• Empress-class Super Freighter
• Class 720 Freighter
• Herald-class Shuttle
• 578-R Space Transport

VEHICLES:

• QH-1 Imperial barge
• EVS Construction Droid
• Senate Shuttlebus
• Personnel Skiff Model IV

This allows you to now take a full squad with you. Enjoy!

EDIT: I forgot to actually apply the change to existing ships, but it should show 13 passengers now. Sorry!