[FEATURE] Exemplars: API for adding OpenMetrics Exemplars and out-of-the-box integration with OpenTelemetry tracing (#652).
[ENHANCEMENT] Introduce TestContainers integration test, for example for testing different Java versions. This means you need Docker installed to run ./mvnw verify (#652).
[ENHANCEMENT] HTTPServer: Set request/response timeouts (#643).
[ENHANCEMENT] HTTPServer: Make HTTPMetricHandler public so that it can be used in a custom HTTPServer (#665).
[ENHANCEMENT] New JVM memory metrics: jvm_memory_pool_collection_used_bytes, jvm_memory_pool_collection_committed_bytes, jvm_memory_pool_collection_max_bytes, jvm_memory_pool_collection_init_bytes, jvm_memory_objects_pending_finalization (#661, #660).
[ENHANCEMENT] Version bumps (junit, jetty, maven plugins)