Fix type hints regressions (#4855)

Fix regressions from https://github.com/FreshRSS/FreshRSS/pull/4561

Example:

```
PHP Fatal error:  Uncaught TypeError: Argument 1 passed to checkToken() must be an instance of FreshRSS_UserConfiguration, instance of Minz_Configuration given, called in /var/www/FreshRSS/p/api/greader.php on line 1091 and defined in /var/www/FreshRSS/p/api/greader.php:223
Stack trace:
#0 /var/www/FreshRSS/p/api/greader.php(1091): checkToken()
#1 {main}
  thrown in /var/www/FreshRSS/p/api/greader.php on line 223
```

Improvement of https://github.com/FreshRSS/FreshRSS/pull/4110

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/Minz/Configuration.php b/lib/Minz/Configuration.php
index 403d6ccba..6d4aed0ab 100644
--- a/lib/Minz/Configuration.php
+++ b/lib/Minz/Configuration.php
@@ -26,7 +26,7 @@ class Minz_Configuration {
 	 * @param object $configuration_setter an optional helper to set values in configuration
 	 */
 	public static function register($namespace, $config_filename, $default_filename = null, $configuration_setter = null) {
-		self::$config_list[$namespace] = new Minz_Configuration(
+		self::$config_list[$namespace] = new static(
 			$namespace, $config_filename, $default_filename, $configuration_setter
 		);
 	}
@@ -51,7 +51,7 @@ class Minz_Configuration {
 	 * Return the configuration related to a given namespace.
 	 *
 	 * @param string $namespace the name of the configuration to get.
-	 * @return Minz_Configuration object
+	 * @return static object
 	 * @throws Minz_ConfigurationNamespaceException if the namespace does not exist.
 	 */
 	public static function get($namespace) {
@@ -117,7 +117,7 @@ class Minz_Configuration {
 	 * @param string $default_filename the file containing default values, null by default.
 	 * @param object $configuration_setter an optional helper to set values in configuration
 	 */
-	private function __construct($namespace, $config_filename, $default_filename = null, $configuration_setter = null) {
+	private final function __construct($namespace, $config_filename, $default_filename = null, $configuration_setter = null) {
 		$this->namespace = $namespace;
 		$this->config_filename = $config_filename;
 		$this->default_filename = $default_filename;