* Fix normalize_headers not accepting header values in bytes
* Fix inconsistency due to rounding in
CachedResponse.expires_unix property
* Fix form boundary used for cached multipart requests to fully
comply with RFC 2046
* Fix loading cached JSON content with decode_content=True when
the root element is an empty list or object
* Fix usage example with responses library to be compatible
with requests 2.32
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-requests-cache?expand=0&rev=22