Update simd-json to remove security vulnerability

[jeffcharles]

Description of the change

Updating simd-json to a version that does not use lexical-core.

I've also performed some additional sanity testing and it does not look like this breaks JSON behaviour.

Why am I making this change?

To resolve https://github.com/bytecodealliance/javy/security/dependabot/49.

Checklist

• I've updated the relevant CHANGELOG files if necessary. Changes to javy-cli and javy-core do not require updating CHANGELOG files.
• I've updated the relevant crate versions if necessary. Versioning policy for library crates
• I've updated documentation including crate documentation if necessary.

[saulecabrera]

A new javy (the crate) release might make sense after this PR lands?

[jeffcharles]

Yeah I can do that