Prepare 241 (#4904)

* updates to composer

* updated changelog

* fixed installing pecl modules

* * Added documentation for `callArtisan`
* Fixed warning tests for PHPUnit 5.6

* fixed travis builds

* fixed WebDriver tests

Author: DavertMik

tests/data/app/db

@@ -1 +1 @@
-a:1:{s:6:"params";a:0:{}}
+a:0:{}