fix: prevent panic on StatusCode conversion

http_types::StatusCode doesn't support all status codes that http::StatusCode supports, but still implements From<http::StatusCode>, just with an `unwrap`. This is unfortunate because it can cause the client to panic upon responses that contain status codes not explicitly supported by http_types.

src/client/base/tokio.rs

@@ -160,7 +160,12 @@ async fn send_inner(
                             StripeError::from(e.error)
                         })
                         .unwrap_or_else(StripeError::from);
-                    last_status = Some(status.into());
+                    last_status = Some(
+                        // NOTE: StatusCode::from can panic here, so fall back to InternalServerError
+                        //       see https://github.com/http-rs/http-types/blob/ac5d645ce5294554b86ebd49233d3ec01665d1d7/src/hyperium_http.rs#L20-L24
+                        StatusCode::try_from(u16::from(status))
+                            .unwrap_or(StatusCode::InternalServerError),
+                    );
                     last_retry_header = retry;
                     continue;
                 }