Update CITATION.cff

Author: jspaaks

CITATION.cff

@@ -59,5 +59,5 @@ license: "GPL-3.0"
 message: "If you use this software, please cite it using these metadata."
 repository-code: "https://github.com/ADAH-EviDENce/evidence"
 title: evidence
-version: "0.1.0"
+version: "0.2.0"
 ...