修复PHP版本为7.4.4及以上时无法安装的问题；

修复PHP版本为7.4.4及以上时生成小程序的错误：Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`

extend/base/ZipFolder.php

@@ -78,7 +78,7 @@ class ZipFolder
      */
     public function Zip($zipfile, $folder, $ignored = null)
     {
-        $this->ignored_names = is_array($ignored) ? $ignored : $ignored ? array($ignored) : array();
+        $this->ignored_names = is_array($ignored) ? $ignored : ($ignored ? array($ignored) : array());
         if($this->zip->open($zipfile, \ZipArchive::CREATE) !== true)
         {
             throw new Exception("cannot open <$zipfile>\n");

thinkphp/library/think/db/Query.php

@@ -565,7 +565,7 @@ class Query
                         $seq = (ord(substr($type($value), 0, 1)) % $rule['num']) + 1;
                     } else {
                         // 按照字段的首字母的值分表
-                        $seq = (ord($value{0}) % $rule['num']) + 1;
+                        $seq = (ord($value[0]) % $rule['num']) + 1;
                     }
             }
             return $this->getTable() . '_' . $seq;