HighFive assumes containers have a default ctor.

[1uc]

HighFive needlessly assumes that every container has a default constructor. It happens here: https://github.com/BlueBrain/HighFive/blob/94ede4f756f2d1ba77296f0f25d22142e8567e0e/include/highfive/bits/H5Slice_traits_misc.hpp#L161-L162 and here (resize isn't safe to use): https://github.com/BlueBrain/HighFive/blob/94ede4f756f2d1ba77296f0f25d22142e8567e0e/include/highfive/bits/H5Inspector_misc.hpp#L326