Replace recordtype using standard dataclasses module

[cekees]

Mandatory Checklist

Please ensure that the following criteria are met:

• [x] Title of pull request describes the changes/features
• [x] Request at least 2 reviewers
• [x] If new files are being added, the files are no larger than 100kB. Post the file sizes.
• [x] Code coverage did not decrease. If this is a bug fix, a test should cover that bug fix. If a new feature is added, a test should be made to cover that feature.
• [x] New features have appropriate documentation strings (readable by sphinx)
• [x] Contributor has read and agreed with CONTRIBUTING.md and has added themselves to CONTRIBUTORS.md

As a general rule of thumb, try to follow PEP8 guidelines.

Description

[cekees]

@jan-janssen does this work for you?

[jan-janssen]

@jan-janssen does this work for you?

That is an even cleaner solution - thanks!

[cekees]

@jhcollins I had accidentally reverted the change to https for submodule URL's, but that is fixed here. What I do if I need to work on submodule code is use git remote set-url... to switch to git@github.com in the submodule so I can push changes, which doesn't affect the protocol specified in .gitmodules.