chore: make compatible with PHP 8.4

Fixes deprecations introduced in PHP 8.4.

See https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullable-deprecated

Author: ruudk

.github/workflows/phpunit.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: [ '7.3', '7.4', '8.0', '8.1' ]
+        php-versions: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
 
     name: PHP ${{ matrix.php-versions }} Test
 

src/Categories.php

@@ -29,7 +29,7 @@ class Categories
      * @param null|string $dataFilePath
      * @throws Exception
      */
-    public function __construct(string $encoding='utf8', string $dataFilePath = null)
+    public function __construct(string $encoding='utf8', ?string $dataFilePath = null)
     {
         if (is_null($dataFilePath)){
             $dataFilePath = __DIR__ . DIRECTORY_SEPARATOR . 'categories.json';
@@ -137,4 +137,4 @@ public function uniqueAliases(string $string) : array
         }
         return $return;
     }
-}
+}

src/Confusable.php

@@ -34,7 +34,7 @@ class Confusable
      * @param null|string $dataFilePath
      * @throws \Exception
      */
-    public function __construct(Categories $categories, string $encoding='utf8', string $dataFilePath = null)
+    public function __construct(Categories $categories, string $encoding='utf8', ?string $dataFilePath = null)
     {
         if (is_null($dataFilePath)){
             $dataFilePath = __DIR__ . DIRECTORY_SEPARATOR . 'confusables.json';
@@ -217,4 +217,4 @@ public function isDangerous(string $string, array $preferredAliases = []) : bool
         return $this->isMixedScript($string) === true && $this->isConfusable($string, false, $preferredAliases) !== false;
     }
 
-}
+}