Update HAPI structures lib version to 6.0.1

Author: jingtang10

buildSrc/src/main/kotlin/Dependencies.kt

@@ -177,7 +177,7 @@ object Dependencies {
     const val desugarJdkLibs = "1.1.5"
     const val fhirUcum = "1.0.3"
     const val guava = "28.2-android"
-    const val hapiFhir = "5.4.0"
+    const val hapiFhir = "6.0.1"
     const val http = "4.9.1"
     // TODO: The next release of HAPI FHIR will hopefully have
     // https://github.com/hapifhir/hapi-fhir/pull/3043 merged in. If it does, when we update, we