judge: skip subtask if already unaccepted (#34)

packages/hydrooj/package.json

@@ -30,8 +30,8 @@
         "serialize-javascript": "^5.0.1",
         "sockjs": "^0.3.20",
         "superagent": "^6.1.0",
-        "supports-color": "^7.2.0",
-        "systeminformation": "^4.30.1",
+        "supports-color": "^8.0.0",
+        "systeminformation": "^4.30.6",
         "wtfnode": "^0.8.4",
         "yargs": "^16.1.1"
     },