add QUIC 39 to supported versions

The Chrome installed on Travis doesn't support QUIC 39 yet.

Changelog.md

@@ -2,7 +2,7 @@
 
 ## v0.6.0 (unreleased)
 
-- Add support for QUIC 38
+- Add support for QUIC 38 and 39
 - Added `quic.Config` options for maximal flow control windows
 - Add a `quic.Config` option for QUIC versions
 - Add a `quic.Config` option to request truncation of the connection ID from a server

integrationtests/chrome/chrome_test.go

@@ -2,6 +2,7 @@ package chrome_test
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/lucas-clemente/quic-go/protocol"
 
@@ -16,6 +17,9 @@ var _ = Describe("Chrome tests", func() {
 			supportedVersionsBefore := protocol.SupportedVersions
 
 			BeforeEach(func() {
+				if version == protocol.Version39 && os.Getenv("TRAVIS") == "true" {
+					Skip("The chrome version running on Travis doesn't support QUIC 39 yet.")
+				}
 				protocol.SupportedVersions = []protocol.VersionNumber{version}
 			})
 

protocol/version.go

@@ -18,6 +18,7 @@ const (
 // SupportedVersions lists the versions that the server supports
 // must be in sorted descending order
 var SupportedVersions = []VersionNumber{
+	Version39,
 	Version38,
 	Version37,
 	Version36,