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Allow the current Symfony LTS version for components. 2.5 is out of date and 2.6 will be soon. Update composer.lock for all symfony components to be consistent. Update our code a bit to not trigger deprecation errors, Change-Id: Ie4f495a95d8c4f9647e95ff611689f1bd5ed1208 Resolves: #68688 Releases: master Reviewed-on: http://review.typo3.org/42203 Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org> Tested-by: Helmut Hummel <helmut.hummel@typo3.org> Reviewed-by: Patrik Karisch <p.karisch@pixelart.at> Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl> Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
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