Upgrade coding standard

composer.json

@@ -40,7 +40,7 @@
     },
     "require-dev": {
         "ext-xdebug": "*",
-        "aplus/coding-standard": "^2.1",
+        "aplus/coding-standard": "^2.8",
         "ergebnis/composer-normalize": "^2.15",
         "phpmd/phpmd": "^2.13",
         "phpstan/phpstan": "^1.9",

src/Box.php

@@ -46,7 +46,7 @@ public function __construct(
         #[SensitiveParameter]
         string $publicKey,
         #[SensitiveParameter]
-        string $nonce = null
+        ?string $nonce = null
     ) {
         $this->secretKey = $secretKey;
         $this->publicKey = $publicKey;
@@ -128,7 +128,7 @@ public function encrypt(
         #[SensitiveParameter]
         string $message,
         #[SensitiveParameter]
-        string $nonce = null
+        ?string $nonce = null
     ) : string {
         return \sodium_crypto_box(
             $message,
@@ -155,7 +155,7 @@ public function decrypt(
         #[SensitiveParameter]
         string $ciphertext,
         #[SensitiveParameter]
-        string $nonce = null
+        ?string $nonce = null
     ) : false | string {
         return \sodium_crypto_box_open(
             $ciphertext,

src/GenericHash.php

@@ -103,7 +103,7 @@ protected function validateHashLength(int $length) : void
     public function signature(
         #[SensitiveParameter]
         string $message,
-        int $hashLength = null
+        ?int $hashLength = null
     ) : string {
         return Utils::bin2base64(
             $this->makeHash($message, $hashLength),
@@ -129,7 +129,7 @@ public function verify(
         string $message,
         #[SensitiveParameter]
         string $signature,
-        int $hashLength = null
+        ?int $hashLength = null
     ) : bool {
         return \hash_equals(
             $this->makeHash($message, $hashLength),
@@ -149,7 +149,7 @@ public function verify(
      *
      * @return string
      */
-    protected function makeHash(#[SensitiveParameter] string $message, int $length = null) : string
+    protected function makeHash(#[SensitiveParameter] string $message, ?int $length = null) : string
     {
         if ($length !== null) {
             $this->validateHashLength($length);

src/Password.php

@@ -58,8 +58,8 @@ class Password
     public static function hash(
         #[SensitiveParameter]
         string $password,
-        int $opslimit = null,
-        int $memlimit = null
+        ?int $opslimit = null,
+        ?int $memlimit = null
     ) : string {
         $opslimit ??= static::getOpsLimit();
         $memlimit ??= static::getMemLimit();
@@ -84,8 +84,8 @@ public static function hash(
     public static function needsRehash(
         #[SensitiveParameter]
         string $hash,
-        int $opslimit = null,
-        int $memlimit = null
+        ?int $opslimit = null,
+        ?int $memlimit = null
     ) : bool {
         $opslimit ??= static::getOpsLimit();
         $memlimit ??= static::getMemLimit();