.github/workflows: update wasmbrowsertest to fix timeout issue

Updates #1313

.github/workflows/test.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Install wasmbrowsertest
         run: |
-          wasmbrowsertest_version=6e494bb3a5ddfe6cccb449250dbdcaa5777b593d
+          wasmbrowsertest_version=2c08e5b313d11223b7d68e14ec280b00e7341ac3
           go install github.com/agnivade/wasmbrowsertest@${wasmbrowsertest_version}
           mv $(go env GOPATH)/bin/wasmbrowsertest${{ runner.os == 'Windows' && '.exe' || '' }} $(go env GOPATH)/bin/go_js_wasm_exec${{ runner.os == 'Windows' && '.exe' || '' }}
           go install github.com/agnivade/wasmbrowsertest/cmd/cleanenv@${wasmbrowsertest_version}

audio/audio_test.go

@@ -17,7 +17,6 @@ package audio_test
 import (
 	"bytes"
 	"io"
-	"os"
 	"runtime"
 	"testing"
 	"time"
@@ -36,14 +35,6 @@ func teardown() {
 	context = nil
 }
 
-func TestMain(m *testing.M) {
-	code := m.Run()
-	// 200[ms] should be enough all the players are consumed.
-	// TODO: This is a dirty hack. Would it be possible to use virtual time?
-	time.Sleep(200 * time.Millisecond)
-	os.Exit(code)
-}
-
 // Issue #746
 func TestGC(t *testing.T) {
 	setup()

audio/internal/convert/float32_test.go

@@ -18,22 +18,12 @@ import (
 	"bytes"
 	"io"
 	"math/rand" // TODO: Use math/rand/v2 when the minimum supported version becomes Go 1.22.
-	"os"
 	"testing"
-	"time"
 	"unsafe"
 
 	"github.com/hajimehoshi/ebiten/v2/audio/internal/convert"
 )
 
-func TestMain(m *testing.M) {
-	code := m.Run()
-	// Tests in this package often fails on GitHub Actions due to unfinished goroutines.
-	// That's mysterious, but to avoid this, sleep for a while before exiting.
-	time.Sleep(200 * time.Millisecond)
-	os.Exit(code)
-}
-
 func randInt16s(n int) []int16 {
 	r := make([]int16, n)
 	for i := range r {

internal/shader/shader_test.go

@@ -21,7 +21,6 @@ import (
 	"runtime"
 	"strings"
 	"testing"
-	"time"
 
 	"github.com/hajimehoshi/ebiten/v2/internal/shader"
 	"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
@@ -30,13 +29,6 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/shaderir/msl"
 )
 
-func TestMain(m *testing.M) {
-	code := m.Run()
-	// The Wasm tests on GitHub CI often fail due to some remaining functions. Wait for a while to finish them.
-	time.Sleep(100 * time.Millisecond)
-	os.Exit(code)
-}
-
 func glslVertexNormalize(str string) string {
 	p := glsl.VertexPrelude(glsl.GLSLVersionDefault)
 	if strings.HasPrefix(str, p) {