Add support for PHP 7.4 version

Signed-off-by: Henrique Moody <henriquemoody@gmail.com>

.travis.yml

@@ -5,6 +5,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
   - nightly
 
 cache:

library/Rules/Cnh.php

@@ -56,7 +56,7 @@ final class Cnh extends AbstractRule
         }
 
         $dv2 = $s2 % 11 - ($dv1 > 9 ? 2 : 0);
-        $check = $dv2 < 0 ? $dv2 + 11 : $dv2 > 9 ? 0 : $dv2;
+        $check = $dv2 < 0 ? $dv2 + 11 : ($dv2 > 9 ? 0 : $dv2);
 
         return $input[10] == $check;
     }

library/Rules/Pesel.php

@@ -13,6 +13,7 @@ declare(strict_types=1);
 
 namespace Respect\Validation\Rules;
 
+use function is_scalar;
 use function preg_match;
 
 /**
@@ -29,17 +30,22 @@ final class Pesel extends AbstractRule
      */
     public function validate($input): bool
     {
-        if (!preg_match('/^\d{11}$/', (string) $input)) {
+        if (!is_scalar($input)) {
+            return false;
+        }
+
+        $stringInput = (string) $input;
+        if (!preg_match('/^\d{11}$/', (string) $stringInput)) {
             return false;
         }
 
         $weights = [1, 3, 7, 9, 1, 3, 7, 9, 1, 3];
 
-        $targetControlNumber = $input[10];
+        $targetControlNumber = $stringInput[10];
         $calculateControlNumber = 0;
 
         for ($i = 0; $i < 10; ++$i) {
-            $calculateControlNumber += $input[$i] * $weights[$i];
+            $calculateControlNumber += $stringInput[$i] * $weights[$i];
         }
 
         $calculateControlNumber = (10 - $calculateControlNumber % 10) % 10;