ASTReducer: correctly type scalar values

[IvanGoncharov]

Context: only nodes are mapped in reducer and leafs inside nodes stays as is.

[netlify]

✅ Deploy Preview for compassionate-pike-271cb3 ready!

Name	Link
🔨 Latest commit	a6a7595
🔍 Latest deploy log	https://app.netlify.com/sites/compassionate-pike-271cb3/deploys/64281bda2579fb000728657c
😎 Deploy Preview	https://deploy-preview-3873--compassionate-pike-271cb3.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[github-actions]

Hi @IvanGoncharov, I'm @github-actions bot happy to help you with this PR 👋

Supported commands

Please post this commands in separate comments and only one per comment:

• @github-actions run-benchmark - Run benchmark comparing base and merge commits for this PR
• @github-actions publish-pr-on-npm - Build package from this PR and publish it on NPM

[github-advanced-security]

You have successfully added a new CodeQL configuration .github/workflows/pull_request.yml:codeql. As part of the setup process, we have scanned this repository and found no existing alerts. In the future, you will see all code scanning alerts on the repository Security tab.