- Remove the unnecessary `ContainerValue` from the class hierarchy
- Construct `StringValue` with a `std::string` by value to avoid copies
- Remove some indirection by using type names directly instead of aliases
- Use utility methods to lookup/append specific data types for arrays/dicts
- Simplify conversion from unique_ptr to shared_ptr
- Avoid use of `new` and `delete`
- Avoid creating maps of all elements in vector for a single lookup
Hans Goudey
b5082f6640