[JavaScript] support polymorphism

[theweipeng]

What do these changes do?

• Add a tool function called Type.Any which would use the anySerializer during compile time.
• Fixed a bug where the dependencies serializer was null when build anySerializer, so we can't init the dependencies serializer when build it. We replaced it by getting the serializer by ID or tag every time we read or write. However, this modification could hurt the performance of Type.Any.

Related issue number

Closes #813

Check code requirements

• tests added / passed (if needed)
• Ensure all linting tests pass, see here for how to run them