Update Jackson library versions to 2.21-SNAPSHOT

Author: pjfanning

build.sbt

@@ -27,8 +27,8 @@ bomFormat := "xml"
 resolvers += Resolver.sonatypeCentralSnapshots
 
 version := "2.21.0-SNAPSHOT"
-val jacksonAnnotationVersion = "2.20"
-val jacksonCoreVersion = "2.20.0"
+val jacksonAnnotationVersion = "2.21-SNAPSHOT"
+val jacksonCoreVersion = "2.21.0-SNAPSHOT"
 val jacksonNonCoreVersion = jacksonCoreVersion
 
 autoAPIMappings := true