Update ParallelIO versions

[anton-seaice]

Closes #25

Cherry-pick commits from https://github.com/spack/spack-packages/

[dougiesquire]

Thanks @anton-seaice. Successfully built ACCESS-OM2 locally with this change

[aidanheerdegen]

@harshula is back on the 27th. In his absence I will channel his essence ...

Please replace the Spack upstream PR number with this PR number in the cherry-picked commits' subject line. Also, please add the original Spack upstream commit hash in the commit message.

[anton-seaice]

Thanks @aidanheerdegen

[anton-seaice]

Please look again, comemnts should be addressed :)

[aidanheerdegen]

Thanks and good to go I think.

[harshula]

Hi @anton-seaice , I've removed the merge commit.

[anton-seaice]

You could remove merge commits from the options in repo settings if this is important.

(Noting that Rebase and merge leads to unsigned commits)

[harshula]

Thanks, I've unticked "Allow merge commits".