Dependencies

• Update to spring-boot v2.5.8 (was 2.5.7) to avoid accidentally referring to vulnerable log4j2 versions
• Update to grpc-java v1.42.2 (was 1.42.1) to avoid CVE-2021-22569. See the protobuf advisory
• Update to protobuf v3.19.2 (was 3.19.1) to avoid CVE-2021-22569. See the protobuf advisory
• spring-cloud v2020.0.5