reimplement with Array.Copy

[todo]

las-cs/src/LasCs.cs

Lines 173 to 178 in 1cec7b7

	// TODO: reimplement with Array.Copy
	public static T[][] chunk<T>(T[] arr, int size)
	{
	int i = 0;
	return arr.GroupBy(s => i++ / size).Select(g => g.ToArray()).ToArray();
	}

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This issue was generated by todo based on a TODO comment in 1cec7b7. It's been assigned to @iykekings because they committed the code.