build(deps-dev): bump tsx from 4.20.6 to 4.21.0

Bumps [tsx](https://github.com/privatenumber/tsx) from 4.20.6 to 4.21.0.
- [Release notes](https://github.com/privatenumber/tsx/releases)
- [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs)
- [Commits](privatenumber/tsx@v4.20.6...v4.21.0)

---
updated-dependencies:
- dependency-name: tsx
  dependency-version: 4.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

apps/treeshake-test/package.json

@@ -18,7 +18,7 @@
     "esbuild": "^0.25.10",
     "ts-loader": "^9.5.4",
     "tsdown": "^0.15.6",
-    "tsx": "^4.19.2",
+    "tsx": "^4.21.0",
     "typescript": "catalog:types",
     "webpack": "^5.102.0",
     "webpack-cli": "^6.0.1"