Drop support for Python 3.7 (EOL since June 2023) #343

Job	Run time
deploy	0s
test (linting,docs, 3.11, false)	38s
test (py311-dj42-postgres-xdist-coverage, 3.11, false)	2m 25s
test (py310-dj41-postgres-xdist-coverage, 3.10, false)	2m 33s
test (py310-dj32-postgres-xdist-coverage, 3.10, false)	2m 22s
test (py311-dj41-mysql_innodb-coverage, 3.11, false)	2m 26s
test (py310-dj42-mysql_innodb-coverage, 3.10, false)	3m 0s
test (py39-dj32-mysql_innodb-xdist-coverage, 3.9, false)	2m 47s
test (py38-dj41-sqlite-xdist-coverage, 3.8, false)	2m 0s
test (py38-dj32-sqlite-xdist-coverage, 3.8, false)	2m 2s
test (py310-djmain-sqlite-coverage, 3.10, true)	2m 5s
test (py38-dj32-mysql_myisam-coverage, 3.8, false)	2m 16s
test (py38-dj32-sqlite-pytestmin-coverage, 3.8, false)	1m 53s
test (pypy3-dj32-postgres, pypy3.9, false)	3m 25s
	29m 52s

Provide feedback