v1.0.3

Added

• nhttp_ws_frame:scan_utf8/1 and nhttp_ws_frame:scan_utf8/2 scan a run
  of text for UTF-8 validity and return the trailing bytes that do not yet
  form a character

Changed

• nhttp_ws:decode_with_state/2 returns {continue, Rest, Decoder} when it
  consumes a non-final fragment. The call returned {more, 1, Decoder}
  before, which hid the fact that the frame was consumed

Fixed

• Return the unconsumed rest of the buffer after a WebSocket fragment. A
  caller that kept the whole buffer decoded the same fragment again and
  failed with expected_continuation
• Validate a fragmented text message as UTF-8 (RFC 6455 §5.6) per fragment,
  with the character that spans two frames carried across. A message that
  ends with a truncated character is refused as invalid_utf8

Full Changelog: v1.0.2...1.0.3