Fix py38-django31 test and add codecov badge

9 jobs for 0.8.0 in 4 minutes and 21 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Pre Commit
passed #1186602793
pre-commit-check

00:00:44

 
  Test
passed #1186602795
test-36-django22

00:01:43

91.0%
passed #1186602797
test-36-django31

00:01:43

91.0%
passed #1186602798
test-37-django22

00:01:39

91.0%
passed #1186602800
test-37-django31

00:01:26

91.0%
passed #1186602802
test-38-django22

00:01:24

91.0%
passed #1186602803
test-38-django31

00:01:23

91.0%
passed #1186602794
test-docs

00:01:38

 
  Deploy
passed #1186602805
deploy-pypi

00:00:28