build: Bump github.com/lucas-clemente/quic-go from 0.19.3 to 0.21.0

[dependabot]

Bumps github.com/lucas-clemente/quic-go from 0.19.3 to 0.21.0.

Changelog

Sourced from github.com/lucas-clemente/quic-go's changelog.

Changelog

v0.20.0 (unreleased)

• Remove the quic.Config.HandshakeTimeout. Introduce a quic.Config.HandshakeIdleTimeout.

v0.17.1 (2020-06-20)

• Supports QUIC WG draft-29.
• Improve bundling of ACK frames (#2543).

v0.16.0 (2020-05-31)

• Supports QUIC WG draft-28.

v0.15.0 (2020-03-01)

• Supports QUIC WG draft-27.
• Add support for 0-RTT.
• Remove Session.Close(). Applications need to pass an application error code to the transport using Session.CloseWithError().
• Make the TLS Cipher Suites configurable (via tls.Config.CipherSuites).

v0.14.0 (2019-12-04)

• Supports QUIC WG draft-24.

v0.13.0 (2019-11-05)

• Supports QUIC WG draft-23.
• Add an EarlyListener that allows sending of 0.5-RTT data.
• Add a TokenStore to store address validation tokens.
• Issue and use new connection IDs during a connection.

v0.12.0 (2019-08-05)

• Implement HTTP/3.
• Rename quic.Cookie to quic.Token and quic.Config.AcceptCookie to quic.Config.AcceptToken.
• Distinguish between Retry tokens and tokens sent in NEW_TOKEN frames.
• Enforce application protocol negotiation (via tls.Config.NextProtos).
• Use a varint for error codes.
• Add support for quic-trace.
• Add a context to Listener.Accept, Session.Accept{Uni}Stream and Session.Open{Uni}StreamSync.
• Implement TLS key updates.

v0.11.0 (2019-04-05)

• Drop support for gQUIC. For qQUIC support, please switch to the gquic branch.
• Implement QUIC WG draft-19.
• Use qtls for TLS 1.3.
• Return a tls.ConnectionState from quic.Session.ConnectionState().

... (truncated)

Commits

• af3e100 Merge pull request #3192 from lucas-clemente/remove-qtls-functions-go-117
• bffe540 remove CipherSuiteName and HkdfExtract for Go 1.17
• a2c1493 fix relocation target for cipherSuiteTLS13ByID in Go 1.17
• 99a936b Merge pull request #3173 from lucas-clemente/use-x-crypto-hkdf-expand
• 22112b7 use HkdfExtract from x/crypto
• 31191f7 Merge pull request #3190 from lucas-clemente/quic-v1
• 68da2c4 add support for QUIC v1, RFC 9000
• 540c6ec Merge pull request #3174 from lucas-clemente/use-tls-cipher-suite-name
• 0790066 Merge pull request #3175 from lucas-clemente/dont-use-qtls-hkdf-expand-label
• bfb938d Merge pull request #3181 from lucas-clemente/reduce-packet-number-generator-t...
• Additional commits viewable in compare view

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Superseded by #10.