Changelog (v5.1.0-BETA1...v5.1.0-RC1)
- bug #36823 fix PHP warning + accept status code >= 600 (nicolas-grekas)
- bug #36773 preserve the identity of responses streamed by TraceableHttpClient (nicolas-grekas)
- bug #36766 add TimeoutExceptionInterface (nicolas-grekas)
- bug #36765 fix dealing with informational response (nicolas-grekas)