Make try-except more explicit: check ImportError #93

Job	Run time
build_test_dist (3.7, ubuntu-latest)	12s
build_test_dist (3.7, windows-latest)	10s
build_test_dist (3.7, macos-latest)	6s
build_test_dist (3.8, ubuntu-latest)	13s
build_test_dist (3.8, windows-latest)	8s
build_test_dist (3.8, macos-latest)	9s
build_test_dist (3.9, ubuntu-latest)	11s
build_test_dist (3.9, windows-latest)	9s
build_test_dist (3.9, macos-latest)	11s
build_test_dist (3.10, ubuntu-latest)	9s
build_test_dist (3.10, windows-latest)	9s
build_test_dist (3.10, macos-latest)	15s
build_test_dist (3.11, ubuntu-latest)	11s
build_test_dist (3.11, windows-latest)	8s
build_test_dist (3.11, macos-latest)	11s
build_test_dist (3.12, ubuntu-latest)	1s
build_test_dist (3.12, windows-latest)	1s
build_test_dist (3.12, macos-latest)	1s
build_test_wheels	0s
upload_to_pypi	0s
	2m 35s

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