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

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[ikawaha]

🙌

[dragon3]

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