FIX(composer.json): update cakephp/cakephp to 3.4.* instead of 3.4.0

Refs: #752
3 jobs for 752_composer_cakephp.version.3.4 in 2 minutes and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #26651
phpcs

00:00:34

passed #26653
phpunit

00:01:46

36.57%
failed #26652
phpunit

00:01:51

36.57%