* 3.4:
Remove branch-version (keep them for contracts only)
[Serializer] fix decoding float XML attributes starting with 0
add missing dutch translations
[Validator] Add missing romanian translations
do not translate null placeholders or titles
* 4.3:
fix PHP 5.6 compatibility
[Cache] fixed TagAwareAdapter returning invalid cache
Add plus character `+` to legal mime subtype
Make Symfony\Contracts\Service\Test\ServiceLocatorTest abstract
bug #33942 [DI] Add extra type check to php dumper
[Dotenv] search variable values in ENV first then env file
[PropertyInfo] Respect property name case when guessing from public method name
[VarDumper] fix resetting the "bold" state in CliDumper
Missing argument in method_exists
SCA: added missing break in a loop
* 3.4:
Add plus character `+` to legal mime subtype
[Dotenv] search variable values in ENV first then env file
[VarDumper] fix resetting the "bold" state in CliDumper
SCA: added missing break in a loop
* 3.3:
Removed useless argument $definition
Fix comment
[Config] Fix checking class existence freshness
bumped Symfony version to 3.3.7
updated VERSION for 3.3.6
updated CHANGELOG for 3.3.6
Bump minimal PHP version to ^5.5.9|>=7.0.8
