Updated version info and HISTORY.rst.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
4 jobs for v0.12.8 in 9 minutes and 19 seconds (queued for 17 minutes and 26 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_enpt #27775

00:07:49

89.0%
passed test_styles #27776

00:00:32

 
  Deploy
passed create_github_release #27778

00:00:24

passed deploy_pypi #27777

00:00:34