Update dependencies

vendor/github.com/coder/websocket/internal/xsync/int64.go

@@ -0,0 +1,23 @@
+package xsync
+
+import (
+	"sync/atomic"
+)
+
+// Int64 represents an atomic int64.
+type Int64 struct {
+	// We do not use atomic.Load/StoreInt64 since it does not
+	// work on 32 bit computers but we need 64 bit integers.
+	i atomic.Value
+}
+
+// Load loads the int64.
+func (v *Int64) Load() int64 {
+	i, _ := v.i.Load().(int64)
+	return i
+}
+
+// Store stores the int64.
+func (v *Int64) Store(i int64) {
+	v.i.Store(i)
+}