chore(deps): update dependency @swc/core to v1.15.21

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
     "@shelf/eslint-config": "5.2.3",
     "@shelf/prettier-config": "1.0.0",
     "@shelf/tsconfig": "0.1.0",
-    "@swc/core": "1.13.5",
+    "@swc/core": "1.15.21",
     "@swc/jest": "0.2.39",
     "@types/jest": "30.0.0",
     "@types/node": "22.18.6",