feature #20093 Twig extensions refatoring to decouple definitions from implementations (fabpot)
feature #20093 Twig extensions refatoring to decouple definitions from implementations (fabpot)

This PR was merged into the 3.2-dev branch.

Discussion
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Twig extensions refatoring to decouple definitions from implementations

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | see Twigphp/twig#1913
| License       | MIT
| Doc PR        | not yet

This PR tries to use the new Twig runtime loader to the Twig bridge extensions.

Commits
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b515702 fixed circular reference in Twig Form integration
4b5e412 removed on indirection
c07fc58 [TwigBridge] decoupled Form extension definitions from its runtime

symfony/twig-bundle,symfony/twig-bundle