Merge pull request #76 from astrofrog/csv-fix #37

Job	Run time
tests / Load tox environments	7s
tests / py39-test-psutil56 (ubuntu-latest)	52s
tests / py310-test-psutil57 (ubuntu-latest)	42s
tests / py311-test-psutil58-alldeps (ubuntu-latest)	52s
tests / py312-test-psutil59 (ubuntu-latest)	46s
tests / py39-test-psutil56 (macos-12)	1m 33s
tests / py310-test-psutil57 (macos-latest)	1m 3s
tests / py311-test-psutil58-alldeps (macos-latest)	57s
tests / py312-test-psutil59 (macos-latest)	49s
tests / py39-test-psutil56 (windows-latest)	2m 13s
tests / py310-test-psutil57 (windows-latest)	2m 12s
tests / py311-test-psutil58-alldeps (windows-latest)	2m 35s
tests / py312-test-psutil59 (windows-latest)	1m 44s
publish / Build source and wheel distribution	1m 45s
	18m 10s

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