Symfony 3.4.21 released

Symfony 3.4.21 has just been released. Here is a list of the most important changes:

• bug #29494 [HttpFoundation] Fix request uri when it starts with double slashes (@alquerci)
• bug #29679 [HttpKernel] Correctly Render Signed URIs Containing Fragments (@zanbaldwin)
• bug #29754 Ensure final input of CommandTester works with default (@Firehed)
• bug #29695 [Form] Do not ignore the choice groups for caching (@vudaltsov)
• bug #29738 [Intl] handle null date and time types (@xabbuh)
• bug #29704 [FrameworkBundle] improve errors in tests missing the BrowserKit component (@xabbuh)
• bug #29617 [Console] Add specific replacement for help text in single command applications (@codedmonkey)
• bug #29714 [Event Dispatcher] fixed 29703: TraceableEventDispatcher reset() callStack to null (@mlievertz)
• bug #29597 [DI] fix reporting bindings on overriden services as unused (@nicolas-grekas)
• bug #29639 [Yaml] detect circular references (@xabbuh)
• bug #29411 [EventDispatcher] Revers event tracing order (@ro0NL)
• bug #29533 Fixed public directory when configured in composer.json (@alexander-schranz)
• bug #29619 [Console] OutputFormatter: move strtolower to createStyleFromString (@ogizanagi)
• bug #29621 [Security] Prefer clone() over unserialize(serialize()) for user refreshment (@chalasr)
• bug #29587 [Debug] ignore underscore vs backslash namespaces in DebugClassLoader (@nicolas-grekas)
• bug #29584 [FrameworkBundle] fix describing routes with no controllers (@nicolas-grekas)
• bug #29582 [DI] move RegisterServiceSubscribersPass before DecoratorServicePass (@kbond)
• bug #29527 [TwigBridge][Form] Prevent multiple rendering of form collection prototypes (@Shoplifter)
• bug #29571 [Yaml] ensures that the m _interna _encoding is reset to its initial value (@Jörn Lang)
• bug #29513 [Hackday][Serializer] Deserialization ignores argument type hint from phpdoc for array in constructor argument (@karser)
• bug #29323 [Security] defer log message in guard authenticator (@eschultz-magix)
• bug #29531 [Validator] Added IBAN format for Vatican City State (@raulfraile)
• bug #29307 [Form] Filter arrays out of scalar form types (@nicolas-grekas)
• bug #29500 [Form] filter out invalid Intl values (@xabbuh)
• bug #29499 [Validator] Fixed grouped composite constraints (@HeahDude)

Want to upgrade to this new release? Fortunately, because Symfony protects backwards-compatibility very closely, this should be quite easy. Read our upgrade documentation to learn more.

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