Add sync => go-sync

sync/time/time.go

@@ -0,0 +1,18 @@
+// Package time provides clock synchronization
+package time
+
+import (
+	"context"
+	"time"
+)
+
+// Time returns synchronized time
+type Time interface {
+	Now() (time.Time, error)
+}
+
+type Options struct {
+	Context context.Context
+}
+
+type Option func(o *Options)