fix: support older NumPy #1620

Job	Run time
Linux (3.11, numpy, pyarrow)	9m 18s
Linux (3.10, numpy, pyarrow)	8m 47s
Linux (3.9, numpy, pyarrow)	9m 39s
Linux (3.8, numpy, pyarrow)	7m 45s
Linux (3.8, numpy==1.18.0, pyarrow)	7m 41s
Linux (3.8, numpy, pyarrow==7.0.0)	7m 8s
Linux (3.12, numpy>=1.26.0b1, pyarrow;python_version<'3.12')	5m 26s
Linux-ROOT-dask-awkward (3.8)	10m 6s
MacOS (3.12)	7m 17s
MacOS (3.11)	9m 46s
MacOS (3.10)	8m 45s
MacOS (3.9)	8m 56s
MacOS (3.8)	8m 32s
Windows (3.12, x64)	9m 20s
Windows (3.11, x64)	9m 30s
Windows (3.10, x64)	11m 51s
Windows (3.9, x64)	9m 26s
Windows (3.8, x64)	9m 21s
Windows (3.9, x86)	10m 50s
	2h 49m 24s

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