GH-357 - Reinstantiate general compatibility with Boot 3.2 / Framework 6.1.

We now gracefully fall back to reflective invocation of the application event listener shouldHandle(…) method if we're not on Spring Framework 6.2. If we are, we invoke the newly introduced method directly.

This allows projects to upgrade to Spring Modulith 1.1 without necessarily upgrading to Boot 3.2.

.github/workflows/integration.yaml

@@ -10,6 +10,8 @@ jobs:
     strategy:
       matrix:
         version:
+        - '3.1.5'
+        - '3.1.6-SNAPSHOT'
         - '3.2.0-SNAPSHOT'
     name: Build against Boot ${{ matrix.version }}
     runs-on: ubuntu-latest