ci: test on Python 3.9
ci: test on Python 3.9

beancount/fava,yagebu/fava,aumayr/beancount-web,aumayr/beancount-web,beancount/fava,beancount/fava,yagebu/fava,yagebu/fava,beancount/fava,aumayr/beancount-web,yagebu/fava,aumayr/beancount-web,yagebu/fava,beancount/fava