yii2: Failed to instantiate component or class "cache".

What steps will reproduce the problem?

Since version 2.0.33 the urlManager will throw an exception if cache component is not properly configured.

Failed to instantiate component or class "cache".

Now the out of the box setup process is disturbed i would say. Assuming the following config:

return [
'id' => 'luya-test-case',
'basePath' => dirname(__DIR__),
'components' => [
	'urlManager' => [
	    'rules' => [
		// my rules goes here
	    ]
	],
	'db' => [
	    'class' => 'yii\db\Connection',
	    'dsn' => 'sqlite::memory:',
	],
];

Before version 2.0.33 it was possible to run this code above, but since version 2.0.33 if have to either setup cache component (for example using DummyCache) or set urlManager::$cache to null.

• In order to be strict in terms of configuration would either recommend to set urlManager::$cache to null by default (which requires people to take action to enable caching, which seems to be unpractical as well). (https://github.com/yiisoft/yii2/blob/master/framework/web/UrlManager.php#L135)
• Or define DummyCache in coreComponents (https://github.com/yiisoft/yii2/blob/master/framework/base/Application.php#L624)
• Or just revert that commit: https://github.com/yiisoft/yii2/pull/17890

Additional info

Q	A
Yii version	2.0.33
PHP version	all
Operating system	all