Update CITATION.cff metadata

Author: J535D165

CITATION.cff

@@ -1,10 +1,19 @@
 cff-version: 1.2.0
-message: "If you use this software, please cite it as below."
+title: >-
+  py3data - A flexible and lightweight Python interface to
+  the re3data.org database
+message: 'We appreciate, but do not require, attribution.'
+type: software
 authors:
-- family-names: "De Bruin"
-  given-names: "Jonathan"
-  orcid: "https://orcid.org/0000-0002-4297-0502"
-title: "py3data - A flexible and lightweight Python interface to the re3data.org database"
-version: 0.3
-date-released: 2023-07-29
-url: "https://github.com/J535D165/py3data"
+  - family-names: De Bruin
+    given-names: Jonathan
+    orcid: 'https://orcid.org/0000-0002-4297-0502'
+repository-code: 'https://github.com/J535D165/py3data'
+url: 'https://github.com/J535D165/py3data'
+repository-artifact: 'https://pypi.org/project/py3data/'
+keywords:
+  - data-repository
+  - data-management
+  - research
+  - dataset
+license: MIT