Adds Validator::setValue and make Validator::getValue public (#6292)

Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>
Co-authored-by: Lu Fei <52o@qq52o.cn>

Author: huangdijia

src/Validator.php

@@ -698,6 +698,25 @@ public function setContainer(ContainerInterface $container)
         $this->container = $container;
     }
 
+    /**
+     * Get the value of a given attribute.
+     */
+    public function getValue(string $attribute)
+    {
+        return Arr::get($this->data, $attribute);
+    }
+
+    /**
+     * Set the value of a given attribute.
+     *
+     * @param string $attribute
+     * @param mixed $value
+     */
+    public function setValue($attribute, $value)
+    {
+        Arr::set($this->data, $attribute, $value);
+    }
+
     /**
      * Validate a given attribute against a rule.
      *
@@ -967,14 +986,6 @@ protected function getRule(string $attribute, mixed $rules): ?array
         return null;
     }
 
-    /**
-     * Get the value of a given attribute.
-     */
-    protected function getValue(string $attribute)
-    {
-        return Arr::get($this->data, $attribute);
-    }
-
     /**
      * Call a custom validator extension.
      */