More strict gem pinning to deal with google-protobuf requiring Ruby 2.5+ by mikelorant · Pull Request #199 · awslabs/aws-fluent-plugin-kinesis

Description of changes: The google-protobuf release 3.12.0 requires Ruby 2.5+. The Fluentd docker container still uses Ruby 2.3. Restricting google-protobuf to 3.11.4 resolves this problem. By subm...