migrate: add syzoj (#386)

packages/migrate/lib.ts

@@ -21,3 +21,5 @@ global.Hydro.lib['hash.vj2'] = (password: string, salt: string, udoc: { uname: s
     const mixedSha1 = sha1(md5(unameLower + pmd5) + salt + sha1(pmd5 + salt));
     return `${Buffer.from(uname).toString('base64')}|${mixedSha1}`;
 };
+
+global.Hydro.lib['hash.syzoj'] = (password: string) => md5(`${password}syzoj2_xxx`);