chore(main): release 1.2.1-SNAPSHOT (#21)

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Author: github-actions[bot]

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>org.cardanofoundation</groupId>
     <artifactId>cf-cardano-conversions-java</artifactId>
-    <version>1.2.0</version>
+    <version>1.2.1-SNAPSHOT</version>
     <name>${project.groupId}:${project.artifactId}</name>
     <description>Cardano Conversions</description>
     <url>https://github.com/cardano-foundation/cf-cardano-conversions-java</url>