updated VENDORS for 2.4.0-BETA1
updated min stability to beta
Merge branch '2.3' into 2.4

* 2.3:
  Backport issue 426 / PR 429 to branch 2.2
  updated VENDORS for 2.2.10
  updated VENDORS for 2.2.9
  updated VENDORS for 2.2.8
  updated VENDORS for 2.2.6
  updated VENDORS for 2.2.5
  updated demo code to use the non-deprecated features of Twig
  updated VENDORS for 2.2.4
  updated VENDORS for 2.2.3
  updated VENDORS for 2.2.2

Conflicts:
	app/config/config_dev.yml
Merge branch '2.4'

* 2.4:
  updated min stability to beta
  updated VENDORS for 2.4.0-BETA1