BUG: no arrays in df.attrs #63

Job	Run time
Test against different Python versions (3.7, ubuntu-latest)	28s
Test against different Python versions (3.7, windows-latest)	1m 10s
Test against different Python versions (3.7, macos-latest)	39s
Test against different Python versions (3.8, ubuntu-latest)	25s
Test against different Python versions (3.8, windows-latest)	1m 32s
Test against different Python versions (3.8, macos-latest)	1m 5s
Test against different Python versions (3.9, ubuntu-latest)	32s
Test against different Python versions (3.9, windows-latest)	1m 22s
Test against different Python versions (3.9, macos-latest)	46s
Test against different Python versions (3.10, ubuntu-latest)	30s
Test against different Python versions (3.10, windows-latest)	1m 28s
Test against different Python versions (3.10, macos-latest)	1m 20s
Test against different Python versions (3.11, ubuntu-latest)	30s
Test against different Python versions (3.11, windows-latest)	1m 26s
Test against different Python versions (3.11, macos-latest)	1m 8s
	14m 21s

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