Don’t require PHP 7.1

Author: tillkruss

src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php

@@ -522,7 +522,7 @@ protected function castToClass($key)
             return $this->classCastCache[$key];
         }
 
-        [$type, $attributes] = $this->getClassCast($key);
+        list($type, $attributes) = $this->getClassCast($key);
 
         if ($attributes) {
             $parameters = array_map(function ($key) {
@@ -563,7 +563,7 @@ protected function mergeAttributesFromClassCasts()
     {
         foreach ($this->getCasts() as $attribute => $cast) {
             if ($this->isClassCastable($attribute)) {
-                [$type, $attributes] = $this->getClassCast($attribute);
+                list($type, $attributes) = $this->getClassCast($attribute);
 
                 $attributeCount = count($attributes);
                 $object = $this->castToClass($attribute);
@@ -649,7 +649,7 @@ public function setAttribute($key, $value)
     protected function setClassCastableAttribute($key, $value)
     {
         if (is_null($value)) {
-            [$cast, $attributes] = $this->getClassCast($key);
+            list($cast, $attributes) = $this->getClassCast($key);
 
             $this->attributes = array_merge(
                 $this->attributes,