Release 2.8.2

Refs dogsheep#57, dogsheep#58

Release 2.8.1

Refs dogsheep#56

Run tests against Python 3.9

Release 2.7

Refs dogsheep#50 and dogsheep#52

Release 2.6

Refs dogsheep#50

Release 2.5

Refs dogsheep#47

Release 2.4

Refs dogsheep#43, dogsheep#44

Release 2.3

Refs dogsheep#42

Release 2.2

Refs dogsheep#36, dogsheep#10, dogsheep#12, dogsheep#35, dogsheep#33, dogsheep#4

Release 2.1, refs dogsheep#34