Downgrading version of Python used by RTD
Jumping from 3.7 to 3.9 didn't work because of deprecated features in RTD's config. The old feature set should still support 3.8, so this is downgrading to that for now.
Jumping from 3.7 to 3.9 didn't work because of deprecated features in RTD's config. The old feature set should still support 3.8, so this is downgrading to that for now.