A simple direct update from 0.5 to be compatible with bevy 0.10

The new plan is to release the 0.6 major features under 0.7 before bevy 0.11. This allows me to have more time to work on them, while still allowing those who depend on bevy_atmosphere to be able to update to bevy 0.10.

Thank you @BrandonDyer64 for this update.