adding NamedArrayPartition type

[jlchan]

I added a NamedArrayPartition type in https://github.com/jlchan/StartUpDG.jl; in case it's useful, here are the changes as a PR.

The array type is just an array partition with named fields, e.g.,

julia> x = NamedArrayPartition(a = randn(10), b = randn(2,2))
julia> x.a # should return the stored result from randn(10)

The main difference from ArrayPartition is that I require each individual array to have the same eltype. I forgot why I did this originally, but I'm happy to fix this if needed.

[jlchan]

Sorry, dismissed the review after fixing a conflict

[ChrisRackauckas]

bump the version down to test it.

[jlchan]

bump the version down to test it.

Thanks for the tip. Done in e6d2680, mind approving CI once more?

[jlchan]

Formatting tests were failing for a bunch of files; is it OK if I just lump a bunch of formatting commits into this PR or would you prefer that in a separate one?

[ChrisRackauckas]

Don't run the formatter, it needs an update.

[jlchan]

Thanks for catching that I forgot to load the packages in my tests @ChrisRackauckas. I think I've fixed the last failing test - would you mind approving the CI again?

[ChrisRackauckas]

Last thing, just add to the docs.

[jlchan]

Thanks!