adds a line of documentation around the custom non-Send http client

Author: irevoire

README.md

@@ -244,6 +244,7 @@ Json output:
 By default, the SDK uses [`reqwest`](https://docs.rs/reqwest/latest/reqwest/) to make http calls.
 The SDK lets you customize the http client by implementing the `HttpClient` trait yourself and
 initializing the `Client` with the `new_with_client` method.
+You may be interested by the `futures-unsend` feature which lets you specify a non-Send http client.
 
 ## 🌐 Running in the Browser with WASM <!-- omit in TOC -->
 

src/lib.rs

@@ -222,6 +222,7 @@
 //! By default, the SDK uses [`reqwest`](https://docs.rs/reqwest/latest/reqwest/) to make http calls.
 //! The SDK lets you customize the http client by implementing the `HttpClient` trait yourself and
 //! initializing the `Client` with the `new_with_client` method.
+//! You may be interested by the `futures-unsend` feature which lets you specify a non-Send http client.
 #![warn(clippy::all)]
 #![allow(clippy::needless_doctest_main)]