Merge pull request #212 from kkovary/211-fix-resource-warning #856

Job	Run time
os=ubuntu-latest - python=3.9 - rdkit=2022.09	2m 4s
os=ubuntu-latest - python=3.9 - rdkit=2023.03	2m 24s
os=macos-latest - python=3.9 - rdkit=2022.09	6m 32s
os=macos-latest - python=3.9 - rdkit=2023.03	8m 37s
os=windows-latest - python=3.9 - rdkit=2022.09	8m 45s
os=windows-latest - python=3.9 - rdkit=2023.03	10m 41s
os=ubuntu-latest - python=3.10 - rdkit=2022.09	2m 20s
os=ubuntu-latest - python=3.10 - rdkit=2023.03	2m 10s
os=macos-latest - python=3.10 - rdkit=2022.09	6m 24s
os=macos-latest - python=3.10 - rdkit=2023.03	5m 30s
os=windows-latest - python=3.10 - rdkit=2022.09	9m 57s
os=windows-latest - python=3.10 - rdkit=2023.03	10m 10s
os=ubuntu-latest - python=3.11 - rdkit=2023.03	2m 20s
	1h 17m 54s

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