Complete PHPStan Level 6 (#5305)

* Complete PHPStan Level 6
Fix https://github.com/FreshRSS/FreshRSS/issues/4112
And initiate PHPStan Level 7

* PHPStan Level 6 for tests
* Use phpstan/phpstan-phpunit
* Update to PHPStan version 1.10

* Fix mixed bug

* Fix mixed return bug

* Fix paginator bug

* Fix FreshRSS_UserConfiguration

* A couple more Minz_Configuration bug fixes

* A few trivial PHPStan Level 7 fixes

* A few more simple PHPStan Level 7

* More files passing PHPStan Level 7
Add interface to replace removed class from https://github.com/FreshRSS/FreshRSS/pull/5251

* A few more PHPStan Level 7 preparations

* A few last details

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/app/Utils/passwordUtilTest.php b/tests/app/Utils/passwordUtilTest.php
index ddccb784f..113476c63 100644
--- a/tests/app/Utils/passwordUtilTest.php
+++ b/tests/app/Utils/passwordUtilTest.php
@@ -1,7 +1,7 @@
 <?php
 
 class passwordUtilTest extends PHPUnit\Framework\TestCase {
-	public function testCheck() {
+	public function testCheck(): void {
 		$password = '1234567';
 
 		$ok = FreshRSS_password_Util::check($password);
@@ -9,7 +9,7 @@ class passwordUtilTest extends PHPUnit\Framework\TestCase {
 		$this->assertTrue($ok);
 	}
 
-	public function testCheckReturnsFalseIfEmpty() {
+	public function testCheckReturnsFalseIfEmpty(): void {
 		$password = '';
 
 		$ok = FreshRSS_password_Util::check($password);
@@ -17,7 +17,7 @@ class passwordUtilTest extends PHPUnit\Framework\TestCase {
 		$this->assertFalse($ok);
 	}
 
-	public function testCheckReturnsFalseIfLessThan7Characters() {
+	public function testCheckReturnsFalseIfLessThan7Characters(): void {
 		$password = '123456';
 
 		$ok = FreshRSS_password_Util::check($password);