CompatHelper: bump compat for NCDatasets to 0.13, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the NCDatasets package from 0.12.11 to 0.12.11, 0.13.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[visr]

This will need some updates to the code. At least Wflow is affected by this change:

• ncvar2D[:] flattens the data in the 2D NetCDF variable ncvar2D. To read the full array one need to use ncvar2D[:,:] or Array(ncvar2D) (similarly for 3D, 4D... arrays).

Probably it's not worth supporting both 0.12 and 0.13, so I think we should drop 0.12 support after these issues are addressed.

https://github.com/Alexander-Barth/NCDatasets.jl/releases/tag/v0.13.0

[JoostBuitink]

I took a a quick look, and it appears that there are hardly (none) changes required to make our code compatible with 0.13. Only one line in the tests broke, but all other code looks to be fine. I still decided to drop 0.12, to be clear that we are compliant with 0.13

[visr]

What about lines like flood_depths = Float.(nc["flood_depth"][:]), are those variables 1D or does it just not matter that we flatten them?

[JoostBuitink]

Those are 1d (as they are a dimension in the netcdf)!

[verseve]

Thanks for checking Joost, looks good to me!