Function between 

pub fn between(value: &Value, rule: &str, _data: &Value, _field: &str) -> bool

between 验证数据 — 对齐 PHP between

对齐 PHP Validate.php 第 1299-1307 行

PHP 行为

[$min, $max] = explode(',', $rule);
return $value >= $min && $value <= $max;