fixup! Improve Close UX

nhooyr · nhooyr · commit 040f9772f52a · 2019-05-17T09:50:57.000-04:00
diff --git a/websocket.go b/websocket.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"os"
 	"runtime"
 	"sync"
 	"sync/atomic"
