Bumped version.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
5 jobs for v0.18.4 in 13 minutes and 59 seconds (queued for 49 minutes and 25 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_enpt #79891

00:10:17

91.0%
passed test_styles #79892

00:00:43

passed test_urls #79893

00:01:25

 
  Deploy
passed create_github_release #79895

00:00:39

passed deploy_pypi #79894

00:00:52