Fix reading complex type and add basic round trip test

[nhz2]

This PR adds some basic round trip tests, which caught a bug in how complex numbers are read.

The test/python.jl file tests that zarr-python is able to read data from Zarr.jl. This PR adds some tests that Zarr.jl is able to read data from Zarr.jl.

[coveralls]

Pull Request Test Coverage Report for Build 17166774584

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.4%) to 88.487%

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Totals
Change from base Build 13680422725:	2.4%
Covered Lines:	953
Relevant Lines:	1077

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💛 - Coveralls

[nhz2]

Bump

[mkitti]

Why did

sizemapf(x::Type{<:Complex{T}}) where T = sizeof(T)

exist before?

[nhz2]

I think a typo. Also, what numpy calls complex64, Julia calls ComplexF32, so that might be part of the confusion. https://numpy.org/doc/stable/reference/arrays.interface.html#type-description-examples