Upgrade to Spring Boot 2.4.0-M2

[sdeleuze]

And related Boot milestone

[wilkinsona]

We don't yet have any firm plans for a Spring Boot 2.4 milestone that will consume Framework 5.3 M1. In the past we've skipped straight to M2. How helpful to your work here would it be to have a Boot 2.4 M1 that builds on Framework 5.3 M1?

[sdeleuze]

If Spring Framework 5.3 M1 remains compatible with Spring Boot 2.3.x, I think we can live with that. The impact for us is that we will keep Spring Boot substitutions (like the one to remove XML usage for example) until your milestone at M2 timeframe.

If Spring Framework 5.3 M1 introduces incompatible changes, that would block us and a related Boot milestone would be really needed.

[sdeleuze]

@wilkinsona I have removed our intermediate 0.7.1 milestone to clarify the roadmap and will "just" leverage Spring Framework 5.3 M1 on spring-graalvm-native master branch, so if Spring Boot snapshots are leveraging Spring Framework 5.3 M1 we should be fine.