Bump behat/behat from 3.0.15 to 3.11.0 in /tests

Bumps [behat/behat](https://github.com/Behat/Behat) from 3.0.15 to 3.11.0.
- [Release notes](https://github.com/Behat/Behat/releases)
- [Changelog](https://github.com/Behat/Behat/blob/master/CHANGELOG.md)
- [Commits](Behat/Behat@v3.0.15...v3.11.0)

---
updated-dependencies:
- dependency-name: behat/behat
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/composer.json

@@ -2,6 +2,6 @@
     "require-dev": {
     },
     "require": {
-        "behat/behat": "3.0.*"
+        "behat/behat": "3.11.*"
     }
 }