judge: 记录测试数据的最后使用时间

packages/hydrojudge/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.3.15",
+    "version": "2.3.16",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
@@ -32,4 +32,4 @@
         "build": "tsc",
         "lint": "eslint . --ext ts --fix"
     }
-}
+}