Release 0.13.4

# History

## 0.13.4

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.13.4/bootstrap.sh
sudo DOKKU_TAG=v0.13.4 bash bootstrap.sh
```

### Bug Fixes

- #3337: @josegonzalez Use correct container id variable for killing containers

### New Features

- #3338: @josegonzalez Redirect ps:retire output to a log file

debian/control

@@ -1,5 +1,5 @@
 Package: dokku
-Version: 0.13.3
+Version: 0.13.4
 Section: web
 Priority: optional
 Architecture: amd64