add test for geoip

packages/geoip/test/lib.spec.ts

@@ -0,0 +1,9 @@
+jest.mock('hydrooj/src/loader');
+import * as lib from '@hydrooj/geoip/lib';
+
+describe('geoip', () => {
+    test('MD5', () => {
+        expect(lib.lookup('127.0.0.1', 'zh_CN')).toStrictEqual({});
+        expect(lib.lookup('1.1.1.1', 'zh-CN').display).toStrictEqual('大洋洲 澳大利亚');
+    });
+});