0.2.0

CHANGES:

• Improve certificate checking and authentication
  (#93) -
  @Firgeis
• Check certificate SAN IP address when appropriate
  (#96) -
  @Firgeis
• Close the file descriptor when failing to open a connection
  (#97) -
  @EduardoRFS
• Yield to other threads when reading a message body. This improves fairness
  for large message bodies
  (#100)
• Add error handling to Response.of_file
  (#103)
• Add Client.send which sends a Request.t
  (#110)
• openssl: set the client verify callback
  (#112)
• Piaf.Response: add or_internal_error
  (#120)
• Piaf.Response: Add Body.sendfile and Response.sendfile
  (#124)
• Piaf.Config: Add config.flush_headers_immediately
  (#125)
• Piaf.Server: Add config.shutdown_timeout to wait before shutting down the
  Piaf server (#174)
• Websocket support (#139)
• Multicore support (#151)
• Allow binding to UNIX domain socket
  (#161)
• Don't send invalid HTTP/2 headers
  (#197)