Fix param type for hasAny() in Illuminate\Support\MessageBag (#43841)

* fix param type for MessageBag hasAny()

* add has any with key null test

Co-authored-by: Joshua Schuler <[email protected]>

Author: schulerj89

src/Illuminate/Support/MessageBag.php

@@ -139,7 +139,7 @@ public function has($key)
     /**
      * Determine if messages exist for any of the given keys.
      *
-     * @param  array|string  $keys
+     * @param  array|string|null  $keys
      * @return bool
      */
     public function hasAny($keys = [])

tests/Support/SupportMessageBagTest.php

@@ -151,6 +151,14 @@ public function testHasAnyIndicatesExistence()
         $this->assertFalse($container->hasAny('baz', 'biz'));
     }
 
+    public function testHasAnyWithKeyNull()
+    {
+        $container = new MessageBag;
+        $container->setFormat(':message');
+        $container->add('foo', 'bar');
+        $this->assertTrue($container->hasAny(null));
+    }
+
     public function testHasIndicatesExistenceOfAllKeys()
     {
         $container = new MessageBag;