DevKit updates for 4.x branch (#906)

Author: SonataCI

.github/PULL_REQUEST_TEMPLATE.md

@@ -23,7 +23,7 @@ Closes #{put_issue_number_here}.
 
 <!-- MANDATORY
     Fill the changelog part inside the code block.
-    Follow this schema: http://keepachangelog.com/
+    Follow this schema: https://keepachangelog.com/
     This will end up on https://github.com/sonata-project/SonataClassificationBundle/releases,
     please keep it short and clear and to the point
 -->
@@ -34,10 +34,13 @@ Closes #{put_issue_number_here}.
     (eg. update to docs, tests)
 -->
 
-<!-- REMOVE EMPTY SECTIONS -->
+<!-- REMOVE EMPTY SECTIONS
+    - Don't repeat the verb in the messages (don't use "Added", "Changed", etc).
+    - Don't use a full stop at the end of the messages.
+-->
 ```markdown
 ### Added
-- Added some `Class::newMethod()` to do great stuff.
+- Some `Class::newMethod()` to do great stuff
 
 ### Changed
 

CONTRIBUTING.md

@@ -35,7 +35,7 @@ you using the latest patch version?
 
 GitHub Issues is for **issues**, as opposed to question on how to use Sonata.
 If you are not sure this is a bug, or simply want to ask such a question,
-please post your question on [Stack Overflow](http://stackoverflow.com/questions/tagged/sonata),
+please post your question on [Stack Overflow](https://stackoverflow.com/questions/tagged/sonata),
 using the `sonata` tags.
 
 If you happen to find a bug, we kindly request you report it. However,
@@ -79,11 +79,11 @@ But please, read the following before.
 
 #### Coding style
 
-Each project follows [PSR-1](http://www.php-fig.org/psr/psr-1/), [PSR-2](http://www.php-fig.org/psr/psr-2/)
-and [Symfony Coding Standards](http://symfony.com/doc/current/contributing/code/standards.html) for coding style,
-[PSR-4](http://www.php-fig.org/psr/psr-4/) for autoloading.
+Each project follows [PSR-1](https://www.php-fig.org/psr/psr-1/), [PSR-2](https://www.php-fig.org/psr/psr-2/)
+and [Symfony Coding Standards](https://symfony.com/doc/current/contributing/code/standards.html) for coding style,
+[PSR-4](https://www.php-fig.org/psr/psr-4/) for autoloading.
 
-Please [install PHP Coding Standard Fixer](http://cs.sensiolabs.org/#installation)
+Please [install PHP Coding Standard Fixer](https://cs.symfony.com/#installation)
 and run this command before committing your modifications:
 
 ```bash
@@ -207,13 +207,13 @@ Your note can be put on one of these sections:
 * `Fixed` for any bug fixes.
 * `Security` to invite users to upgrade in case of vulnerabilities.
 
-More information about the followed changelog format: [keepachangelog.com](http://keepachangelog.com/)
+More information about the followed changelog format: [keepachangelog.com](https://keepachangelog.com/)
 
 #### Base branch
 
 Before writing a PR, you have to check on which branch your changes SHOULD be based.
 
-Each project follows [semver](http://semver.org/) convention for release management.
+Each project follows [semver](https://semver.org/) convention for release management.
 
 Here is a short table resuming on which you have to start:
 
@@ -329,7 +329,7 @@ If the deprecated thing is a service, you **MUST** specify it on the service def
  </service>
  ```
 
-More info: http://symfony.com/blog/new-in-symfony-2-8-deprecated-service-definitions
+More info: https://symfony.com/blog/new-in-symfony-2-8-deprecated-service-definitions
 
 For everything else, not managed by the `@deprecated` tag,
 you **MUST** still trigger a deprecation message (and add a `NEXT_MAJOR` comment).

README.md

@@ -28,7 +28,7 @@ Check out the documentation on the [official website](https://docs.sonata-projec
 
 ## Support
 
-For general support and questions, please use [StackOverflow](http://stackoverflow.com/questions/tagged/sonata).
+For general support and questions, please use [StackOverflow](https://stackoverflow.com/questions/tagged/sonata).
 
 If you think you found a bug or you have a feature idea to propose, feel free to open an issue
 **after looking** at the [contributing guide](CONTRIBUTING.md).