vjudge: use BasicFetcher (#496)

packages/vjudge/package.json

@@ -2,7 +2,7 @@
     "name": "@hydrooj/vjudge",
     "version": "1.7.3",
     "description": "Submit problems to remote oj",
-    "main": "package.json",
+    "main": "src/model.ts",
     "repository": "https://github.com/hydro-dev/Hydro.git",
     "author": "undefined",
     "license": "AGPL-3.0-or-later",
@@ -10,12 +10,10 @@
     "dependencies": {
         "@hydrooj/utils": "workspace:*",
         "jsdom": "^21.0.0",
-        "superagent": "^8.0.6",
         "superagent-proxy": "^3.0.0"
     },
     "devDependencies": {
         "@types/jsdom": "^20.0.1",
-        "@types/superagent": "^4.1.16",
         "@types/superagent-proxy": "^3.0.0"
     }
 }