chore(deps): bump js-yaml to 4.2.0 — clear GHSA-h67p-54hq-rp68 (#1338)

js-yaml <= 4.1.1 has a quadratic-complexity DoS in merge-key handling via
repeated aliases (GHSA-h67p-54hq-rp68 / CVE-2026-53550, medium). Patched in
4.2.0. js-yaml is dev-only here (direct devDependency + deduped transitive via
eslint/@eslint/eslintrc), so shipped users are not exposed; the bump clears
Dependabot alert #9 and patches the floor. The existing ^4.1.1 range already
permitted 4.2.0 — this only refreshes the stale lockfile pin. npm audit: 0
vulnerabilities.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-no-only-tests": "^3.4.0",
     "fast-check": "^4.8.0",
     "globals": "^16.5.0",
-    "js-yaml": "^4.1.1",
+    "js-yaml": "^4.2.0",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.60.0"
   },