Raise supported PHP version to 8.0 and related updates

.github/workflows/php.yml

@@ -11,9 +11,6 @@ jobs:
     strategy:
       matrix:
         php-versions:
-          - "7.2"
-          - "7.3"
-          - "7.4"
           - "8.0"
           - "8.1"
           - "8.2"

composer.json

@@ -25,14 +25,14 @@
         }
     },
     "require": {
-        "php": ">=7.2"
+        "php": ">=8.0"
     },
     "require-dev": {
-        "ockcyp/covers-validator": "^1.3.3",
-        "phpunit/phpunit": "^8.5.13||^9.5.0",
+        "ockcyp/covers-validator": "^1.7.0",
+        "phpunit/phpunit": "^9.6.34",
         "php-parallel-lint/php-console-highlighter": "^1.0",
         "php-parallel-lint/php-parallel-lint": "^1.4",
-        "friendsofphp/php-cs-fixer": "^3.4",
+        "friendsofphp/php-cs-fixer": "^3.94",
         "brainmaestro/composer-git-hooks": "^2.8"
     },
     "scripts": {

phpunit.xml

@@ -1,14 +1,13 @@
-<phpunit colors="true"
-		 beStrictAboutTestsThatDoNotTestAnything="true"
-		 beStrictAboutOutputDuringTests="true">
-	<testsuites>
-		<testsuite name="HOTP PHP Tests">
-			<directory>./tests</directory>
-		</testsuite>
-	</testsuites>
-	<filter>
-		<whitelist addUncoveredFilesFromWhitelist="true">
-			<directory suffix=".php">./src</directory>
-		</whitelist>
-	</filter>
+<?xml version="1.0"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" beStrictAboutTestsThatDoNotTestAnything="true" beStrictAboutOutputDuringTests="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage includeUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="HOTP PHP Tests">
+      <directory>./tests</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>

src/HOTP.php

@@ -46,7 +46,7 @@ public static function generateByCounter(string $key, int $counter): HOTPResult
      * @param int|false $timestamp a timestamp to calculate for, defaults to time()
      * @return HOTPResult a HOTP Result which can be truncated or output
      */
-    public static function generateByTime(string $key, int $window, $timestamp = false): HOTPResult
+    public static function generateByTime(string $key, int $window, int|false $timestamp = false): HOTPResult
     {
         if (!$timestamp && $timestamp !== 0) {
             // @codeCoverageIgnoreStart
@@ -70,7 +70,7 @@ public static function generateByTime(string $key, int $window, $timestamp = fal
      * @param int|false $timestamp a timestamp to calculate for, defaults to time()
      * @return HOTPResult[]
      */
-    public static function generateByTimeWindow(string $key, int $window, int $min = -1, int $max = 1, $timestamp = false): array
+    public static function generateByTimeWindow(string $key, int $window, int $min = -1, int $max = 1, int|false $timestamp = false): array
     {
         if (!$timestamp && $timestamp !== 0) {
             // @codeCoverageIgnoreStart

src/HOTPResult.php

@@ -14,14 +14,11 @@
  */
 class HOTPResult
 {
-    protected $hash;
-    protected $decimal;
-    protected $hex;
+    private ?int $decimal = null;
+    private ?string $hex = null;
 
-    public function __construct(string $value)
+    public function __construct(private string $hash)
     {
-        // store raw
-        $this->hash = $value;
     }
 
     /**