radicle-cli 0.20.0

Radicle CLI
Documentation
Now that the patch is merged, we can update our master branch to the canonical
master, which includes our patch.

First, we confirm that our master is behind:
```
$ git rev-parse master
f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354
```

Then, we call `rad sync --fetch` to fetch from the maintainer:
```
$ rad sync --fetch
Fetching rad:z42hL2jL4XNk6K8oHQaSWfMgCL7ji from the network, found 1 potential seed(s).
✓ Target met: 1 seed(s)
🌱 Fetched from z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi
```

Now let's checkout `master` and pull the maintainer's changes:
```
$ git checkout master
Your branch is up to date with 'rad/master'.
```
``` (stderr) RAD_SOCKET=/dev/null
$ git pull --all --ff
From rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji
   f2de534..f567f69  master     -> rad/master
From rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi
   f2de534..f567f69  master     -> alice@z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/master
```

Now our master branch is up to date with the maintainer's master:

```
$ git rev-parse master
f567f695d25b4e8fb63b5f5ad2a584529826e908
$ git diff master..alice@z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/master
```