Merge pull request #168 from tjenkinson/renovate/rollup-4.x

Update dependency rollup to v4.21.1

Author: github-actions[bot]

package-lock.json

@@ -66,7 +66,7 @@
     "lint-staged": "15.2.9",
     "micromatch": "4.0.8",
     "prettier": "3.3.2",
-    "rollup": "4.21.0",
+    "rollup": "4.21.1",
     "sqlite3": "5.1.7",
     "tslib": "2.7.0",
     "typescript": "5.5.4",