0.5.6

• Added a package command to package either fat jar or a JVMCI fat jar.
• Fix issue preventing GraalJS running on OpenJ9
• Allow specifying absolute path as start module
• implemented module aliases
• fixed node inspector paths for debugging
• fixed runtime definitions
• es4x-cli has less dependencies and can be used by npx
• vertx-scripts has been replaced by es4x-cli
• Decoupled Codec from the engine (avoids calls on the wrong context)
• Several clean ups