Prohibit upgrades to jOOQ 3.20.0

[wilkinsona]

We can't upgrade to jOOQ 3.20.0 as it requires Java 21, exceeding our Java 17 baseline.

[Legioth]

A bit unrelated, but is a Java 17 baseline required also for dependencies that have their version defined through https://start.spring.io/? Or does it only apply for dependencies in the Spring Boot BOM? Initializr could in theory only offer a dependency in case a compatible Java version is selected.

I'm asking because Vaadin is evaluating the possibility of having Java 21 as the baseline for the upcoming major version that would be built for Spring Boot 4. It's a tough choice for other reasons but it would probably be a deal breaker if it would boot us from Spring Initializr.

Edit: Discussion opened in spring-io/start.spring.io#1732.

[wilkinsona]

Please raise that here: https://github.com/spring-io/start.spring.io/discussions.