chore(deps): update devdependency miniflare to v4

Author: renovate[bot]

package.json

@@ -67,7 +67,7 @@
     "eslint": "^9.20.1",
     "eslint-config-unjs": "^0.4.2",
     "jiti": "^2.4.2",
-    "miniflare": "^3.20250204.0",
+    "miniflare": "^4.20250416.0",
     "prettier": "^3.5.0",
     "rollup": "^4.34.6",
     "typescript": "^5.7.3",