Fix PHP 8.4 deprecation warnings (#18)

* Fix PHP 8.4 deprecation warnings

* Fix another PHP 8.4 deprecation warning

Author: TomA-R

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=5.5",
+        "php": ">=7.1",
         "desarrolla2/cache": "~2.0"
     },
     "require-dev": {

src/RateLimiter.php

@@ -71,7 +71,7 @@ public function __construct(
     /**
      * @inheritdoc
      */
-    public function get($data, ThrottleSettingsInterface $settings = null)
+    public function get($data, ?ThrottleSettingsInterface $settings = null)
     {
         if (empty($data)) {
             throw new \InvalidArgumentException('Invalid data, please check the data.');
@@ -92,7 +92,7 @@ public function get($data, ThrottleSettingsInterface $settings = null)
      *
      * @return ThrottlerInterface
      */
-    private function createThrottler(Data $object, ThrottleSettingsInterface $settings = null)
+    private function createThrottler(Data $object, ?ThrottleSettingsInterface $settings = null)
     {
         if (null === $settings) {
             $settings = $this->defaultSettings;

src/RateLimiterInterface.php

@@ -40,5 +40,5 @@ interface RateLimiterInterface
      *
      * @throws \InvalidArgumentException
      */
-    public function get($data, ThrottleSettingsInterface $throttlerSettings = null);
+    public function get($data, ?ThrottleSettingsInterface $throttlerSettings = null);
 }