Upgrade to PHP 8.1 (#6711)

* Upgrade to PHP 8.1
As discussed in https://github.com/FreshRSS/FreshRSS/discussions/5474

https://www.php.net/releases/8.0/en.php
https://www.php.net/releases/8.1/en.php

Upgrade to available native type declarations
https://php.net/language.types.declarations

Upgrade to https://phpunit.de/announcements/phpunit-10.html which requires PHP 8.1+ (good timing, as version 9 was not maintained anymore)

Upgrade `:oldest` Docker dev image to oldest Alpine version supporting PHP 8.1: Alpine 3.16, which includes PHP 8.1.22.

* Include 6736
https://github.com/FreshRSS/FreshRSS/pull/6736

1 files changed, 5 insertions, 3 deletions

diff --git a/tests/app/Utils/dotNotationUtilTest.php b/tests/app/Utils/dotNotationUtilTest.php
index a04ddba4f..e49220d30 100644
--- a/tests/app/Utils/dotNotationUtilTest.php
+++ b/tests/app/Utils/dotNotationUtilTest.php
@@ -1,12 +1,14 @@
 <?php
 declare(strict_types=1);
 
+use PHPUnit\Framework\Attributes\DataProvider;
+
 class dotNotationUtilTest extends PHPUnit\Framework\TestCase {
 
 	/**
 	 * @return Traversable<array{array<string,mixed>,string,string}>
 	 */
-	public function provideJsonDots(): Traversable {
+	public static function provideJsonDots(): Traversable {
 		$json = <<<json
 		{
 			"hello": "world",
@@ -34,10 +36,10 @@ class dotNotationUtilTest extends PHPUnit\Framework\TestCase {
 	}
 
 	/**
-	 * @dataProvider provideJsonDots
 	 * @param array<string,mixed> $array
 	 */
-	public function testJsonDots(array $array, string $key, string $expected): void {
+	#[DataProvider('provideJsonDots')]
+	public static function testJsonDots(array $array, string $key, string $expected): void {
 		$value = FreshRSS_dotNotation_Util::get($array, $key);
 		self::assertEquals($expected, $value);
 	}