Fire damage is too low

[PowerfulBacon]

Fire damage is far too low after the body heat rework, which seems to make being on fire deal no damage and instead only heat up your mob. I want constant burn damage applied while you are on fire rather than only increasing your temperature. (See body_temperature_damage, as this is where fire damage is applied; handle_fire on species doesn't actually add any burn damage for the ticks that we are on fire)