Release 0.21.3

# History

## 0.21.3

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.21.3/bootstrap.sh
sudo DOKKU_TAG=v0.21.3 bash bootstrap.sh
```

### Bug Fixes

- #4077: @Schlepptop Fix config_all bug introduced in 0.21.2
- #4074: @josegonzalez Force set all plugin permissions on plugin:install/update

### Documentation

- #4073: @josegonzalez Document the official shell client

contrib/dokku-installer.py

@@ -15,7 +15,7 @@ import subprocess
 import sys
 import threading
 
-VERSION = 'v0.21.2'
+VERSION = 'v0.21.3'
 
 def bytes_to_string(b):
     if type(b) == bytes: