Update puma to v4.3.1
This is a security release to patch CVE-2019-16770: https://github.com/puma/puma/blob/master/History.md
Full diff: https://github.com/puma/puma/compare/v4.3.0..v4.3.1
Edited by 🤖 GitLab Bot 🤖
This is a security release to patch CVE-2019-16770: https://github.com/puma/puma/blob/master/History.md
Full diff: https://github.com/puma/puma/compare/v4.3.0..v4.3.1