sendable: add sending without reply field

options.go

@@ -53,6 +53,9 @@ type SendOptions struct {
 
 	// DisableContentDetection abilities to disable server-side file content type detection.
 	DisableContentDetection bool
+
+	// AllowWithoutReply allows sending messages not a as reply if the replied-to message has already been deleted.
+	AllowWithoutReply bool
 }
 
 func (og *SendOptions) copy() *SendOptions {

util.go

@@ -199,6 +199,10 @@ func (b *Bot) embedSendOptions(params map[string]string, opt *SendOptions) {
 		params["disable_content_type_detection"] = "true"
 	}
 
+	if opt.AllowWithoutReply {
+		params["allow_sending_without_reply"] = "true"
+	}
+
 	if opt.ReplyMarkup != nil {
 		processButtons(opt.ReplyMarkup.InlineKeyboard)
 		replyMarkup, _ := json.Marshal(opt.ReplyMarkup)