`StreamedContent` integer overflow

[thomafred]

Describe the bug

Integer overflow for StreamedContent-constructor (ref)when making large requests using blacksheep CLI:

  File "/home/tom/project/odf/app-odcat/controllers/proxy/odcat/proxy/handlers/proxy_handler.py", line 92, in _get_proxy_request
    content = StreamedContent(
  File "blacksheep/contents.pyx", line 32, in blacksheep.contents.StreamedContent.__init__
OverflowError: value too large to convert to int