Moved all matplotlib imports from module level to function/class level to...

Moved all matplotlib imports from module level to function/class level to avoid static TLS ImportError. Updated version info.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
4 jobs for v0.9.23 in 3 minutes and 36 seconds (queued for 8 minutes and 41 seconds)
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  Test
passed #41932
test_arosics

00:02:57

85.0%
passed #41933
test_styles

00:00:09

 
  Deploy
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create_github_release

00:00:08

passed #41934
deploy_pypi

00:00:20