update spotbugs and jacoco for improved jdk support (#339)
update spotbugs and jacoco for improved jdk support (#339)

- jacoco now supports jdk13
- spotbugs has improved jdk11 support

Co-authored-by: Xavier Léauté <402f589227669e58c0fcbd6e310f6c7ed68d95c7@confluent.io>
confluentinc/common,confluentinc/common