bug fixes & improvements for on site contest

packages/hydrooj/package.json

@@ -32,7 +32,7 @@
         "emoji-regex": "^10.6.0",
         "emojis-list": "2.1.0",
         "fs-extra": "^11.3.2",
-        "js-yaml": "^4.1.0",
+        "js-yaml": "^4.1.1",
         "koa-proxies": "^0.12.4",
         "koa-static-cache": "^5.1.4",
         "lodash": "^4.17.21",
@@ -63,7 +63,7 @@
         "@types/lodash": "^4.17.20",
         "@types/mime-types": "^3.0.1",
         "@types/mongodb-uri": "^0.9.4",
-        "@types/nodemailer": "^7.0.3",
+        "@types/nodemailer": "^7.0.4",
         "@types/notp": "^2.0.5",
         "@types/semver": "^7.7.1",
         "@types/superagent": "^8.1.9",