0.5.0

CHANGES:

• gluten-eio: require ~sw:Eio.Switch.t argument and fail the switch when loop
  raises an exception (#61)
• gluten-eio: handle peer disconnects
  (#60)
• gluten: replace Gluten.Buffer implementation and drop the Ke dependency
  (#67)
• gluten-eio: adapt to Eio v0.12 (#66
• gluten-eio: don't fail switches in the I/O loop(#70
• gluten-eio: open up #Eio.Flow.two_way (#62
• gluten-async: async-tls compilation error when using tls-async package (#63)
• gluten-eio, gluten-async, gluten-lwt, gluten-lwt-unix: refactor: unwrap Gluten.Buffer.put in favor of exceptions (#58)