Symfony 5.3.0 released

Symfony 5.3.0 has just been released. Here is a list of the most
important changes:

bug #41458 [FrameworkBundle] fix ConfigBuilderCacheWarmer (@nicolas-grekas)
bug #41456 [FrameworkBundle] fix creating ContainerBuilder at warmup/CLI time (@nicolas-grekas)
bug #41452 [FrameworkBundle] Remove redundant cache service (@derrabus)
bug #41451 [Translation] Remove PoEditor Provider (@welcoMattic)
bug #41000 [Form] Use !isset for checks cause this doesn’t falsely include 0 (@Kai Dederichs)
bug #41407 [DependencyInjection] keep container.servic _subscriber tag on the decorated definition (@xabbuh)
bug #40866 [Filesystem] fix readlink() for Windows (@a1812)
bug #41402 [HttpKernel] Throw when HttpKernel is created and the env is empty (@nicolas-grekas)
bug #41376 [SecurityBundle] Don’t register deprecated listeners with authenticator manager enabled (@chalasr)
bug #41394 [Form] fix support for years outside of the 32b range on x86 arch (@nicolas-grekas)
bug #41380 Make Mailgun Header compatible with other Bridges (@jderusse)
bug #39847 [Messenger] Fix merging PrototypedArrayNode associative values (@svityashchuk)
bug #41367 [Ldap] Avoid calling the deprecated getUsername() (@derrabus)
bug #41346 [WebProfilerBundle] Wrapping exception js in Sfjs check and also loading bas _js Sfjs if needed (@weaverryan)
bug #41344 [VarDumper] Don’t pass null to pars _url() (@derrabus)

Want to upgrade to this new release? Because Symfony protects
backwards-compatibility very closely, this should be quite easy. Use
SymfonyInsight upgrade reports
to detect the code you will need to change in your project and
read our upgrade
documentation to learn more.

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