minor #20085 [SecurityBundle] Fix Twig master dep (nicolas-grekas)

This PR was merged into the 2.8 branch.

Discussion
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[SecurityBundle] Fix Twig master dep

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Since Twig 2 is not tagged yet, it's free to do not-BC changes, which it did recently. Our unmaintained `3.0.*` bridge+bundle don't work with it anymore. Let's skip them.

Commits
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9a2672e [SecurityBundle] Fix Twig master dep

Author: nicolas-grekas

src/Symfony/Bundle/SecurityBundle/composer.json

@@ -30,8 +30,8 @@
         "symfony/form": "~2.8",
         "symfony/framework-bundle": "~2.8",
         "symfony/http-foundation": "~2.4|~3.0.0",
-        "symfony/twig-bundle": "~2.7|~3.0.0",
-        "symfony/twig-bridge": "~2.7|~3.0.0",
+        "symfony/twig-bundle": "~2.7|~3.1.0",
+        "symfony/twig-bridge": "~2.7|~3.1.0",
         "symfony/process": "~2.0,>=2.0.5|~3.0.0",
         "symfony/validator": "~2.5|~3.0.0",
         "symfony/yaml": "~2.0,>=2.0.5|~3.0.0",