JSR223 backend now implements the Invocable API. Expose the script-loader interface to be able to load FScript procedures from the JSR223 engine.

but that introduces a classloader issue for FraSCAti.

Fix a bug with shared components: don't stop the first parent but the binding stub/skeleton container.

Fix a bug with dependency resolution in Juliac Mojo. The previous behaviour was valid only if all snapshots artefacts were deployed at the same time (all build numbers equal). Thanks to Damien for fixing this bug.

Check that interface type signatures when generating proxy classes correspond to Java interfaces, not classes. See the comment in the commited code for the rationale.