Change usage of deprecated contstant FILTER_SANITIZE_STRING to htmlspecialchars and strip_tags

Author: nguereza-tony

src/Message.php

@@ -610,15 +610,7 @@ protected function filterName(string $name): string
             '>'  => ']',
         ];
 
-        $filtered = filter_var(
-            $name,
-            FILTER_SANITIZE_STRING,
-            FILTER_FLAG_NO_ENCODE_QUOTES
-        );
-
-        if ($filtered === false) {
-            return '';
-        }
+        $filtered = htmlspecialchars(strip_tags($name), ENT_NOQUOTES);
 
         return trim(strtr($filtered, $rules));
     }

tests/MessageTest.php

@@ -48,7 +48,7 @@ public function testSetFrom()
         //filter_var return false
         $mock_filter_var_to_false = true;
         $e->setFrom($email, $name);
-        $expected = '"=?UTF-8?B??=" <>';
+        $expected = '"=?UTF-8?B?Bar?=" <>';
         $this->assertEquals($expected, $e->getFrom());
     }