chore: update deno_ast version to 0.50.2

[dragon3]

This pull request updates deno_ast version to 0.50.2.

To solve compile error with the latest serde, like below:

error[E0432]: unresolved import `serde::__private`
Error: --> /XXXX/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/swc_common-9.2.0/src/private/mod.rs:3:9
|
3 | pub use serde::__private as serde;
| ^^^^^^^---------^^^^^^^^^
| | |
| | help: a similar name exists in the module: `private`
| no `__private` in the root

[Copilot]

Pull Request Overview

This PR updates the deno_ast dependency from version 0.48.2 to 0.50.2 to resolve a compilation error with the latest version of serde that causes an unresolved import issue with serde::__private.

• Updated deno_ast version to fix serde compatibility issue

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[ikawaha]

🙌

[dragon3]

Thank you for reviewing 🙇‍♂️ I'm going to merge it 💪