matrix-sdk: Update for the latest backoff changes

matrix_sdk/Cargo.toml

@@ -53,6 +53,7 @@ default_features = false
 [dependencies.backoff]
 git = "https://github.com/ihrwein/backoff"
 features = ["tokio"]
+rev = "fa3fb91431729ce871d29c62b93425b8aec740f4"
 
 [dependencies.tracing-futures]
 version = "0.2.4"

matrix_sdk/src/http_client.rs

@@ -15,7 +15,7 @@
 use std::{convert::TryFrom, fmt::Debug, sync::Arc};
 
 #[cfg(not(test))]
-use backoff::{tokio::retry, Error as RetryError, ExponentialBackoff};
+use backoff::{future::retry, Error as RetryError, ExponentialBackoff};
 #[cfg(not(test))]
 use http::StatusCode;
 use http::{HeaderValue, Method as HttpMethod, Response as HttpResponse};