Debian9 install composer error because libssl1.1 

```bash
 libssl1.1 | 1.1.0j-1~deb9u1 | http://mirrors.ustc.edu.cn/debian-security stretch/updates/main amd64 Packages
 libssl1.1 | 1.1.0f-3+deb9u2 | http://mirrors.ustc.edu.cn/debian stretch/main amd64 Packages
```
* https://travis-ci.org/khs1994-docker/lnmp/builds/464752116