Symfony 4 was released on November 30th.
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Twig 1.22.0 released

Twig 1.22.0 released.

Twig 1.21.2 released

Twig 1.21.2 has just been released and contains a fix for a bug that breaks a lot of applications including recent versions of Symfony (2.3 and 2.7 latest releases).

Twig: How to upgrade to 2.0? Deprecation Notices to the Rescue

How to make your code compatible with Twig 2.0?

Security Release: Twig 1.20.0

I've just released Twig 1.20.0 which contains a security vulnerability fix for Twig's Sandbox mode.