Fix targetType re-instantiation with constructor arguments when non primitive type is passed

[tbhaxor]

Description

Some classes accept arguments via their constructors and include internal validations. One such example is the Timestamp class defined in firebase-admin/firestore, which performs validation during initialisation.

This PR extracts the constructor arguments from the class source string, maps the provided values to the corresponding constructor parameters (assuming the parameters are always assigned to class properties), and uses them to reinitialise the class instance.

Tip

Ideally, value parameter sent to transform() function should be passed directly in such cases. It's unclear why this approach wasn't taken. But since original authors used re-instantiate approach, I am keeping the same.

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

Fixes

Fixes #1825

Note

This is an internal fix, so documentation updates are not necessary. Let me know if you think it should be documented, and where exactly it should go.