Remove the unnecessary uuid dependency along the way

```
thread 'main' panicked at 'there is no reactor running, must be called from the context of Tokio runtime', ~/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.22/src/io/driver/mod.rs:201:9
```

This commit also fixes a cargo-audit warning

Instead, use one chosen indirectly by refinery

By default, warp includes multipart and websockets support.

We don't need either yet, so we might be better off
by not asking them in the first place (including time to compile).

It makes sense now since docker builds
are now somewhat cached/incremental.