Several small (but important) fixes

[Benjamin-Dobell]

Fixes:

• Ensure sub-class won't report parent class props as its own.
• package.json must be bundled on export
  package.json contains metadata required to resolve imports at runtime (package.json exports).
• Ensure JSWorkers are deregistered upon termination
• Preserve PascalCase names in jsb.runtime.d.ts w/ camel-case on
• Move module resolution logging down to verbose