修复oauth.google setting字段异常问题，将__mock__添加至ignore

packages/hydrojudge/src/compile.ts

@@ -7,7 +7,7 @@ import { compilerText } from './utils';
 export = async function compile(
     lang: string, code: string, target: string, copyIn: any, next?: Function,
 ) {
-    const LANGS = yaml.safeLoad(await global.Hydro.model.system.get('hydrojudge.langs') as string);
+    const LANGS = yaml.safeLoad(await global.Hydro.model.system.get('hydrojudge.langs'));
     if (!LANGS[lang]) throw new SystemError(`不支持的语言：${lang}`);
     const info = LANGS[lang];
     const f = {};

packages/hydrojudge/src/service.ts

@@ -8,6 +8,12 @@ import { ObjectID } from 'bson';
 import fs from 'fs-extra';
 import { homedir, tmpdir } from 'os';
 
+declare module 'hydrooj' {
+    interface SystemKeys {
+        'hydrojudge.langs': string,
+    }
+}
+
 async function postInit() {
     // Only start a single daemon
     if (!cluster.isFirstWorker) return;