v0.4.5

• Feature: Support setting read buffer size to null (infinite)
  (#42 by @clue)
• Fix: Do not emit full-drain event if Buffer is closed during drain event
  (#55 by @clue)
• Vastly improved performance by factor of 10x to 20x.
  Raise default buffer sizes to 64 KiB and simplify and improve error handling
  and unneeded function calls.
  (#53, #55, #56 by @clue)