Add dataset creator to contributors

[Ludee]

Summary of the discussion

The role "Creator" or "DatasetCreator" is not part of the DataCite contributorType. But is completely clear.

Having 3 default entries in the "contributors" section is suggested:

"roles": ["Creator"], "object": "dataset",
"roles": ["DataCollector"], "object": "data",
"roles": ["DataCurator"], "object": "metadata",

Type of change (CHANGELOG.md)

Added

• Dataset creator to contributors (#304)

Workflow checklist

Automation

Part of #296 Closes #293

PR-Assignee

• 🐙 Follow the workflow in CONTRIBUTING.md
• 📝 Update the CHANGELOG.md
• 📙 Update the documentation
• 🐙 Assign a reviewer to the PR

Reviewer

• 🐙 Follow the Reviewer Guidelines
• 🐙 Provided feedback and show sufficient appreciation for the work done

[jh-RLI]

I noticed that starting a new version makes it hard to review the changes. In general - As far as i can see - this looks correct.

As in this PR the test are missing i would suggest to merge the initial version of the release files soon. And then only work on the test in this PR #305 . Once the initial version + tests are merged furhter changes can be integrated in a more save way.

Once the initial version is established in dev mode further changes become more scoped and much easier to review. What do you think @Ludee