CakePHP 3.4.0-beta4 now available! This is a beta release for 3.4. and contains bugfixes found by the community.Read more here...
Okay now that I have the new beta correctly installed please show the exact composer command to update it? Thanks
For now, a simple composer update should update things until the final version is released. Once that has happened then composer require cakephp/cakephp:3.4.* will lock your project to stable 3.4 releases.
composer require cakephp/cakephp:3.4.*
Just out of curiosity, after years Why FormHelper::input() was deprecated ?