v3.0.0-RC6

This is the final release candidate for RingoJS 3.0.

What's Changed

• Java 11 Compatibility by @grob in #406
• #365 Update logging to Log4j2 by @grob in #407
• Upgrade to jline3 by @grob in #413
• Modules modernization by @grob in #412
• add fs.getAttributes(path) in vein of java.nio readAttributes by @oberhamsi in #415
• Implements engine.loadJars(), fixes #350 by @botic in #425
• Allows a Binary instance as param for conversion by @botic in #432
• Drops the Java Security Manager support by @botic in #437
• Shell autocompletion/suggestion fixes by @grob in #436
• Adapt to Rhino's NativePromise by @grob in #443
• New ringo-admin by @grob in #435
• Improvements for the logging module by @botic in #445
• Prevent signal() firing too early by @botic in #446

Full Changelog: v2.0.0...v3.0.0-RC6