Replaced deprecated HTTP links. Updated version info.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
4 jobs for v0.9.21 in 4 minutes and 1 second (queued for 21 minutes and 48 seconds)
latest
Status Job ID Name Coverage
  Test
passed #40506
test_arosics

00:03:10

85.0%
passed #40507
test_styles

00:00:12

 
  Deploy
passed #40509
create_github_release

00:00:16

passed #40508
deploy_pypi

00:00:22