Should the default abundance dataset be updated?

[wtbarnes]

We should consider updating the default abundance dataset for v10 and above given that this is what is done for the IDL tools. The test results will also need to be updated accordingly and there will need to be some kind of version-dependent logic as these new abundance sets are not available in older versions of the database.

Beginning in v9, the default abundance is 'sun_photospheric_2015_scott.abund'.

Beginning in v10.1, the default abundance is 'sun_photospheric_2021_asplund.abund'.

Should we switch to these defaults? As it stands, I'm not using the default abundances for v8 or v9 and instead opt for the Feldman coronal abundances. We could start using the updated coronal abundances, 'sun_coronal_2021_chianti.abund'.

I don't think this is a requirement for v10 or v11 compatibility.