Auto-update CITATION.cff from codemeta.json

Author: geoffroy-noel-ddh

CITATION.cff

@@ -0,0 +1,9 @@
+authors:
+- family_names: Noel
+  given_names: Geoffroy
+cff_version: 1.2.0
+message: If you use this software, please cite it using these metadata.
+repository: https://github.com/kingsdigitallab/credits-tools
+title: credits-tools
+type: software
+