0.0.4

CHANGES:

• Add ?tls_config to Http_lwt_client.one_request to enable passing an entire
  TLS configuration
• Avoid exception in resolve_location
• Add ?happy_eyeballs to Http_lwt_client.one_request to allow reusing this
  state across requests
• Initialize Ca_certs.authenticator only once (lazily) to avoid decoding
  trust anchors multiple times
• Fix Http_lwt_unix.Buffer for resizing on put (to avoid errors with H2)
• Avoid exceptions from Lwt.wakeup_later by calling it at most once