添加缓存工具类

src/Tools/Cacher.php

+<?php
+
+namespace Meibuyu\Micro\Tools;
+
+use Psr\SimpleCache\CacheInterface;
+
+/**
+ * Class Cache
+ * @package Meibuyu\Micro\Tools
+ * @method static get($key, $default = null)
+ * @method static set($key, $value, $ttl = null)
+ * @method static delete($key)
+ * @method static clear()
+ * @method static getMultiple($keys, $default = null)
+ * @method static setMultiple($values, $ttl = null)
+ * @method static deleteMultiple($keys)
+ * @method static has($key)
+ */
+class Cacher
+{
+
+    /**
+     * @var CacheInterface
+     */
+    protected static $driver;
+
+    /**
+     * @return CacheInterface
+     */
+    public static function driver()
+    {
+        if (!self::$driver) {
+            self::$driver = container(CacheInterface::class);
+        }
+        return self::$driver;
+    }
+
+    public static function __callStatic($name, $arguments)
+    {
+        return static::driver()->{$name}(...$arguments);
+    }
+
+}
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