Apply fixes from StyleCI

Author: DarkaOnLine

src/Cards/Card.php

@@ -231,7 +231,7 @@ protected function checkImplementation()
      */
     protected function validPattern()
     {
-        return ! ! preg_match(static::$pattern, $this->card_number);
+        return (bool) preg_match(static::$pattern, $this->card_number);
     }
 
     /**

tests/Unit/CardCvcTest.php

@@ -57,6 +57,7 @@ public function it_checks_cvc_code_length()
         $this->assertFalse(Card::isValidCvcLength('12345'));
         $this->assertFalse(Card::isValidCvcLength('123455'));
     }
+
     /**
      * @param string|int $cvc
      *

tests/Unit/CardExpirationTest.php

@@ -123,6 +123,7 @@ public function it_can_be_called_directly()
         $this->assertFalse(Card::isValidExpirationDate('', date('m')));
         $this->assertFalse(Card::isValidExpirationDate(date('Y'), ''));
     }
+
     /**
      * @param string $year
      *