self_update uses reqwest::blocking

[etam]

Calls to self_update must be wrapped in tokio::task::spawn_blocking.

https://docs.rs/reqwest/0.11.2/reqwest/blocking/index.html

Conversely, the functionality in reqwest::blocking must not be executed within an async runtime, or it will panic when attempting to block. If calling directly from an async function, consider using an async reqwest::Client instead. If the immediate context is only synchronous, but a transitive caller is async, consider changing that caller to use tokio::task::spawn_blocking around the calls that need to block.

[tworec]

We are using 0.11.0 and for it documentation does not state that it will panic
https://docs.rs/reqwest/0.11.0/reqwest/blocking/index.html

[etam]

because warning was added later: seanmonstar/reqwest#1159