Release 0.19.5

# History

## 0.19.5

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.19.5/bootstrap.sh
sudo DOKKU_TAG=v0.19.5 bash bootstrap.sh
```

### Bug Fixes

- #3756: @jayjun Redirect missing key_file warning to stderr

contrib/dokku-installer.py

@@ -14,7 +14,7 @@ import subprocess
 import sys
 import threading
 
-VERSION = 'v0.19.4'
+VERSION = 'v0.19.5'
 
 def bytes_to_string(b):
     if type(b) == bytes: