minor symfony#40304 [TwigBridge] Install symfony/intl to run tests on Travis (wouterj)

This PR was merged into the 4.4 branch.

Discussion
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[TwigBridge] Install symfony/intl to run tests on Travis

| Q             | A
| ------------- | ---
| Branch?       | 5.x
| Bug fix?      | bi
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

The hard dependency on `symfony/intl` was removed from the Form component in 5.3-dev (symfony#40298). I suggest to add the explicit dev dependency on TwigBridge on 4.4 already.

Commits
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b297045 [TwigBridge] Install symfony/intl to run tests on Travis

Author: Nyholm

src/Symfony/Bridge/Twig/composer.json

@@ -29,6 +29,7 @@
         "symfony/form": "^4.4.17",
         "symfony/http-foundation": "^4.3|^5.0",
         "symfony/http-kernel": "^4.4",
+        "symfony/intl": "^4.4|^5.0",
         "symfony/mime": "^4.3|^5.0",
         "symfony/polyfill-intl-icu": "~1.0",
         "symfony/routing": "^3.4|^4.0|^5.0",