core: better upgrade mode

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.20.23",
+    "version": "2.20.24",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
@@ -27,14 +27,14 @@
         "lru-cache": "^6.0.0",
         "minio": "7.0.17",
         "moment-timezone": "^0.5.32",
-        "mongodb": "^3.6.4",
+        "mongodb": "^3.6.5",
         "nodemailer": "^6.5.0",
         "p-queue": "^6.6.2",
         "reflect-metadata": "^0.1.13",
         "serialize-javascript": "^5.0.1",
         "sockjs": "^0.3.20",
         "superagent": "^6.1.0",
-        "systeminformation": "5.6.4",
+        "systeminformation": "5.6.7",
         "wtfnode": "^0.8.4",
         "yargs": "^16.2.0"
     },