v0.2.0

• Add support for readable byte streams (#6)
  • Add ReadableStream::(try_)get_byob_reader to acquire a BYOB reader.
  • Add ReadableStream::from_async_read to turn an AsyncRead into a readable byte stream.
  • Add ReadableStream::(try_)into_async_read to turn a readable byte stream into an AsyncRead.
• Improve error handling and drop behavior of ReadableStream::from_stream()