Coverage remained the same at 100.0% when pulling b2635a8b8828e8f278050c76342e57037bd7642e on refactor/airspace into 6bd043423ad2f234d8aa44121939ac58fabe8571 on master.
Coverage remained the same at 100.0% when pulling e06a942b3f4717da4e766db40941035bd843d413 on refactor/airspace into 78a6c20bd6a2fa6b8e84c4a7d9630d3621db04dc on master.
adds a new airspace pkg holding all airspace related interfaces and types/structs. this is part of the refactor effort to get rid of common.
Implements #69.