------------------ - Require fido version 4.2.1 so we stay compatible to code catching crochet.TimeoutError
9.0.6
------------------ - Don't mangle headers with bytestring values on Python 3
9.0.5
------------------ - Make sure headers passed in for fetching specs are converted to str as well
9.0.4
------------------ - Fix regression when passing swagger parameters of type header in ``_request_options`` introduced by PR 288
9.0.3
------------------ - When using the fido HTTP client and passing a timeout to ``result()``, make sure we throw a fido HTTPTimeoutError instead of a crochet TimeoutError when hitting the timeout.
9.0.2
------------------ - ``_requests_options`` headers are casted to ``string`` to support newer version of ``requests`` library.