Rust Pushover client broken with latest dependencies

[emk]

Hello! I just thought you might like to know this:

error[E0432]: unresolved import `curl::http`
  --> /home/emk/.cargo/registry/src/github.com-1ecc6299db9ec823/po-0.1.4/src/lib.rs:11:5
   |
11 | use curl::http;
   |     ^^^^^^^^^^ no `http` in the root

error[E0425]: cannot find function `serialize` in module `form_urlencoded`
   --> /home/emk/.cargo/registry/src/github.com-1ecc6299db9ec823/po-0.1.4/src/lib.rs:145:33
    |
145 |     let body = form_urlencoded::serialize(notification.into_iter());
    |                                 ^^^^^^^^^ not found in `form_urlencoded`

error: aborting due to 2 previous errors

error: Could not compile `po`.

There's no rush on my account—I can just write a little one-off function using the latest version of the reqwest crate. But I thought you'd like to know. And thank you for releasing a Rust library!