chore(deps-dev): bump tsdown from 0.19.0 to 0.21.1 (#208)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -23,7 +23,7 @@
     "@changesets/cli": "^2.29.8",
     "@types/node": "^25.3.5",
     "msw": "^2.12.10",
-    "tsdown": "^0.19.0",
+    "tsdown": "^0.21.1",
     "typescript": "^5.9.3",
     "vitest": "^4.0.18",
     "@openid4vc/oauth2": "workspace:*",