Lazy NCDataset test failures #104
Description
Our CI currently fails (example) when comparing 0-dimensional arrays loaded lazily with NCDatasets because JuliaGeo/NCDatasets.jl#279 switched to making a NCDatasets.Variable a subtype of AbstractDiskArray (so NCDatasets v0.14.9 really should have been marked as a breaking release), and subtraction of 0-dimensional AbstractDimArrays currently fails, see JuliaIO/DiskArrays.jl#285. There's nothing we should/can do here to fix this, it needs an upstream fix.