* http3: rename RoundTripper to Transport
* http3: rename SingleDestinationRoundTripper to ClientConn
* http3: construct the ClientConn via Transport.NewClientConn
This package implements HTTP/3 (RFC 9114), including QPACK (RFC 9204) and HTTP Datagrams (RFC 9297).
It aims to provide feature parity with the standard library's HTTP/1.1 and HTTP/2 implementation.
Detailed documentation can be found on quic-go.net.