Update for API changes

gradle.properties

@@ -2,7 +2,7 @@ kotlin.code.style=official
 kotlin.js.generate.executable.default=false
 
 # versions
-fhirCoreVersion=6.3.14-SNAPSHOT
+fhirCoreVersion=6.3.15-SNAPSHOT
 
 junitVersion=5.7.1
 mockk_version=1.10.2

src/jvmMain/kotlin/controller/validation/GuavaSessionCacheAdapter.kt

@@ -40,6 +40,10 @@ class GuavaSessionCacheAdapter(cacheSize : Long, cacheDuration: Long) : SessionC
         return cache.asMap().keys
     }
 
+    override fun cleanUp() {
+        cache.cleanUp()
+    }
+
     /**
      * Session ids generated internally are UUID [String].
      * @return A new [String] session id.