v0.22.0

Features

• Support http2-prior-knowledge, see #356 (@zuisong)
• Directly bind to interface name on supported platforms, see #359 (@ducaale)
• Enable stream when content-type is text/event-stream, see #360 (@zuisong)
• Decode utf-8 encoded string when formatting non-streaming JSON response, see #361 (@zuisong)

Other

• Upgrade to hyper v1, see #357 (@zuisong)
• Use serde-transcode to optimize JSON formatting, see #362 (@blyxxyz)