Support PHP 8.5

[tommitchelmore]

PHP 8.5

• Upgrade spatie/macroable to ^2.1
• Upgrade laminas/diactoros to ^3.8
• Upgrade phpunit/phpunit to ^12

Macroable is a necessary upgrade, but means we have to drop PHP <8.3

Changes to Closure handling

PHP 8.5 introduces changes to how closures are reported. Instead of just returning 'Closure' they now return more debugging information. To catch this, I've checked for Closure instances:

/**
 * Get the human readable name of this action
 *
 * @return string
 */
public function getActionName()
{
    $callableName = null;

    if ($this->isControllerAction()) {
        return $this->controllerName . '@' . $this->controllerMethod;
    }

+    if ($this->callable instanceof \Closure) {
+        return 'Closure';
+    }
+
    if (is_callable($this->callable, false, $callableName)) {
        list($controller, $method) = explode('::', $callableName);

-        if ($controller === 'Closure') {
-            return $controller;
-        }
-
        return $controller . '@' . $method;
    }
}