update to Go 1.26, drop Go 1.24 (#243)

* update to Go 1.26, drop Go 1.24

* remove synctest wrapper

Author: marten-seemann

.github/workflows/interop.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [ "1.24.x", "1.25.x" ]
+        go: [ "1.25.x", "1.26.x" ]
     steps:
     - uses: actions/checkout@v6
     - uses: nanasess/setup-chromedriver@v2

.github/workflows/lint.yml

@@ -8,11 +8,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [ "1.24.x", "1.25.x" ]
+        go: [ "1.25.x", "1.26.x" ]
     runs-on: ubuntu-latest
     name: Lint
-    env:
-      GOEXPERIMENT: ${{ matrix.go == '1.24.x' && 'synctest' || '' }}
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
@@ -33,4 +31,4 @@ jobs:
         uses: golangci/golangci-lint-action@v9
         with:
           args: --timeout=3m
-          version: v2.7.2
+          version: v2.9.0

.github/workflows/unit.yml

@@ -9,11 +9,9 @@ jobs:
       fail-fast: false
       matrix:
         os: [ "ubuntu", "windows", "macos" ]
-        go: [ "1.24.x", "1.25.x" ]
+        go: [ "1.25.x", "1.26.x" ]
     runs-on: ${{ fromJSON(vars[format('UNIT_RUNNER_{0}', matrix.os)] || format('"{0}-latest"', matrix.os)) }}
     name: Unit tests (${{ matrix.os}}, Go ${{ matrix.go }})
-    env:
-      GOEXPERIMENT: ${{ matrix.go == '1.24.x' && 'synctest' || '' }}
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6

go.mod

@@ -1,6 +1,6 @@
 module github.com/quic-go/webtransport-go
 
-go 1.24
+go 1.25
 
 require (
 	github.com/dunglas/httpsfv v1.1.0

internal/synctest/synctest_go124.go

@@ -8,15 +8,12 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
-	"runtime"
 	"slices"
 	"strconv"
-	"strings"
 	"testing"
+	"testing/synctest"
 	"time"
 
-	"github.com/quic-go/webtransport-go/internal/synctest"
-
 	"github.com/quic-go/quic-go"
 	"github.com/quic-go/quic-go/http3"
 	"github.com/quic-go/quic-go/quicvarint"
@@ -123,12 +120,6 @@ func TestSessionManagerAddingStreams(t *testing.T) {
 }
 
 func TestSessionManagerStreamReordering(t *testing.T) {
-	// synctest works slightly differently on Go 1.24,
-	// so we skip the test
-	if strings.HasPrefix(runtime.Version(), "go1.24") {
-		t.Skip("skipping on Go 1.24 due to synctest issues")
-	}
-
 	synctest.Test(t, func(t *testing.T) {
 		clientPacketConn, serverPacketConn, closeFn := newSimnetLink(t, 10*time.Millisecond)
 		defer closeFn(t)
@@ -264,12 +255,6 @@ func TestSessionManagerStreamReordering(t *testing.T) {
 }
 
 func TestSessionManagerSessionClose(t *testing.T) {
-	// synctest works slightly differently on Go 1.24,
-	// so we skip the test
-	if strings.HasPrefix(runtime.Version(), "go1.24") {
-		t.Skip("skipping on Go 1.24 due to synctest issues")
-	}
-
 	synctest.Test(t, func(t *testing.T) {
 		const rtt = 10 * time.Millisecond
 		clientPacketConn, serverPacketConn, closeFn := newSimnetLink(t, rtt)