add get open api quota method (#2371)

* 增加“查询openAPI调用quota”接口

* 删除“查询openAPI调用quota”中app_id参数

src/OfficialAccount/Base/Client.php

@@ -21,6 +21,25 @@
  */
 class Client extends BaseClient
 {
+    /**
+     * Get api quota.
+     *
+     * @param  string  $cgiPath  api cgi_path
+     *
+     * @return \Psr\Http\Message\ResponseInterface|\EasyWeChat\Kernel\Support\Collection|array|object|string
+     *
+     * @throws \EasyWeChat\Kernel\Exceptions\InvalidConfigException
+     * @throws \GuzzleHttp\Exception\GuzzleException
+     */
+    public function getQuota(string $cgiPath)
+    {
+        $params = [
+            'cgi_path' => $cgiPath,
+        ];
+
+        return $this->httpPostJson('cgi-bin/openapi/quota/get', $params);
+    }
+
     /**
      * Clear quota.
      *