Merge branch '5.4' into 6.0

* 5.4:
  Bump license year
  Bump license year
  [Validator] Error using CssColor with doctrine annotations
  [HttpClient] Turn negative timeout to a very long timeout
  Features goes to 6.x branch
  [Translation] [LocoProvider] Fix use of asset ids
  fix lowest required PropertyInfo component release
  [Validator] throw when Constraint::_construct() has not been called
  Bump Symfony version to 5.4.3
  Update VERSION for 5.4.2
  Update CHANGELOG for 5.4.2
  Bump Symfony version to 5.3.14
  Update VERSION for 5.3.13
  Update CHANGELOG for 5.3.13
  Bump Symfony version to 4.4.37
  Update VERSION for 4.4.36
  Update CONTRIBUTORS for 4.4.36
  Update CHANGELOG for 4.4.36
  Allow symfony/runtime plugin

Author: fabpot

.github/PULL_REQUEST_TEMPLATE.md

@@ -15,7 +15,7 @@ Additionally (see https://symfony.com/releases):
  - Always add tests and ensure they pass.
  - Bug fixes must be submitted against the lowest maintained branch where they apply
    (lowest branches are regularly merged to upper ones so they get the fixes too.)
- - Features and deprecations must be submitted against branch 5.x.
+ - Features and deprecations must be submitted against the latest branch.
  - Changelog entry should follow https://symfony.com/doc/current/contributing/code/conventions.html#writing-a-changelog-entry
  - Never break backward compatibility (see https://symfony.com/bc).
 -->