utoipa-gen-4.3.1

This release fixes utoipa-gen private type leak. This is already fixed in the master but will now be released separately for the utoipa-gen for time being.

Changes

• Bump up utoipa-gen patch version
• change pub(super) enum to pub enum (#926) @cuiihaoo

Full Changelog: utoipa-gen-4.3.0...utoipa-gen-4.3.1