支持php8

.travis.yml

@@ -6,7 +6,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
-  - 7.4
+#  - 7.4
 
 addons:
   chrome: stable

src/Grid/Tools.php

@@ -235,7 +235,7 @@ class Tools implements Renderable
             return $value;
         }
 
-        return preg_replace_callback('/class=[\'|"]([a-z0-9A-Z-_\s]*)[\'|"]/', function (&$text) {
+        return preg_replace_callback('/class=[\'|"]([a-z0-9A-Z-_\s]*)[\'|"]/', function ($text) {
             $class = array_filter(explode(' ', $text[1]));
 
             if (

src/Support/Helper.php

@@ -815,7 +815,7 @@ class Helper
     public static function htmlEntityEncode($item)
     {
         if (is_array($item)) {
-            array_walk_recursive($item, function (&$value) {
+            array_walk_recursive($item, function ($value) {
                 $value = htmlentities($value);
             });
         } else {