Add Sulu Headless Bundle recipe for 3.0 release

[alexander-schranz]

Q	A
License	MIT
Packagist	https://packagist.org/packages/sulu/headless-bundle

For new releases of Sulu Headless Bundle 3.0

[symfony-recipes-bot]

Thanks for the PR 😍

How to test these changes in your application

1. Define the SYMFONY_ENDPOINT environment variable:

   # On Unix-like (BSD, Linux and macOS)
   export SYMFONY_ENDPOINT=https://raw.githubusercontent.com/symfony/recipes-contrib/flex/pull-1984/index.json
   # On Windows
   SET SYMFONY_ENDPOINT=https://raw.githubusercontent.com/symfony/recipes-contrib/flex/pull-1984/index.json

2. Install the package(s) related to this recipe:

   composer req symfony/flex
   composer req 'sulu/headless-bundle:^3.0'

3. Don't forget to unset the SYMFONY_ENDPOINT environment variable when done:

   # On Unix-like (BSD, Linux and macOS)
   unset SYMFONY_ENDPOINT
   # On Windows
   SET SYMFONY_ENDPOINT=

Diff between recipe versions

In order to help with the review stage, I'm in charge of computing the diff between the various versions of patched recipes.
I'm going keep this comment up to date with any updates of the attached patch.

sulu/headless-bundle

0.1 vs 3.0

diff --git a/sulu/headless-bundle/0.1/config/routes/sulu_headless_website.yaml b/sulu/headless-bundle/3.0/config/routes/sulu_headless_website.yaml
index cef3d711..f57c77d8 100644
--- a/sulu/headless-bundle/0.1/config/routes/sulu_headless_website.yaml
+++ b/sulu/headless-bundle/3.0/config/routes/sulu_headless_website.yaml
@@ -1,3 +1,3 @@
 sulu_headless:
     type: portal
-    resource: "@SuluHeadlessBundle/Resources/config/routing_website.yml"
+    resource: "@SuluHeadlessBundle/Resources/config/routing_website.yaml"
diff --git a/sulu/headless-bundle/0.1/post-install.txt b/sulu/headless-bundle/3.0/post-install.txt
index 20888a99..07f54379 100644
--- a/sulu/headless-bundle/0.1/post-install.txt
+++ b/sulu/headless-bundle/3.0/post-install.txt
@@ -1,3 +1,3 @@
   * The SuluHeadlessBundle is almost ready:
     Change the controller of your templates to Sulu\Bundle\HeadlessBundle\Controller\HeadlessWebsiteController::indexAction.
-    Read the documentation at https://github.com/sulu/SuluHeadlessBundle/blob/1.1.0/README.md to learn how.
+    Read the documentation at https://github.com/sulu/SuluHeadlessBundle/blob/3.0/README.md to learn how.