Merge pull request cakephp#733 from othercorey/4.x-env-files

4.x - Updated comment on using .env files

Bump requirements

CakePHP Application 4.0.0-alpha1

* Use CakePHP 4.
* Migrations not included as they are not working yet.

Merge pull request cakephp#654 from garas/travis-fixes

Fix Travis CI testing

Update dependencies.

CakePHP App 3.6.5

* Removed outdated tutorials.
* Added PHPStan
* Added commented out Asset.cacheTime option for AssetMiddleware.

Merge pull request cakephp#620 from highstrike/patch-1

Update Application.php

Merge pull request cakephp#617 from cakephp/load-plugin

move loading plugins into Application

Merge pull request cakephp#611 from cakephp/dereuromark-patch-1

Use constant

Merge pull request cakephp#601 from cakephp/ADmad-patch-1

Add more description for `App.fullBaseUrl` config.