there's a bug (reported in https://bugs.ruby-lang.org/issues/21131) with IO.copy_stream, where yielded duped strings still change value on subsequent yields, which breaks http2 framing, which requires two yields at the same time in the first iteration. it replaces it with #read calls; file handles will now be closed once done streaming, which is a change in behaviour
when building the request signature, the body is preemptively converted to a string, which fulfills the expectation for webmock, despite it being a bit of a perf penalty if the request contains a multipart request body, as the body will be fully read to memory
Closes#319
Closes https://github.com/HoneyryderChuck/httpx/issues/65
most of the code was moved to the transcoder layer.
The `compression_threshold_size` option has been removed.
The `:compression/brotli` plugin becomes only ´:brotli`, and depends on
the new transcoding APIs.
options to skip compression and decompression were added.
