0.6.0

Added

• retry_request and aretry_request helpers, which run the retry loop at the client level so that
  errors raised while reading the response body (such as ReadTimeout and RemoteProtocolError) are
  retried. This is something RetryTransport cannot do, as transports return before the body is read.
  They reject a client that already uses RetryTransport to avoid retrying every request twice. (#79 by
  @will-ockmore)
• validate_response option on Retry to retry when a callback rejects an otherwise-successful
  response (for example, content-level blocks such as a CAPTCHA or authorization wall). (#74 by @vgavro)
• request.extensions["retry"] support, allowing the Retry configuration to be overridden per
  request; the resolved Retry is also attached to response.extensions["retry"] for introspection. (#75
  by @vgavro)
• Retry.copy_with to derive a modified Retry (mirroring httpx.URL.copy_with), convenient for
  per-request overrides via request.extensions["retry"]. (#75 by @vgavro)