minor #760 Updated dependencies to Symfony 4.0.4 (javiereguiluz)

This PR was merged into the master branch.

Discussion
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Updated dependencies to Symfony 4.0.4

Changelog:

  - Updating symfony/flex (v1.0.53 => v1.0.68)
  - Updating doctrine/inflector (v1.2.0 => v1.3.0)
  - Updating symfony/polyfill-mbstring (v1.6.0 => v1.7.0)
  - Updating symfony/http-foundation (v4.0.2 => v4.0.4)
  - Updating symfony/polyfill-php70 (v1.6.0 => v1.7.0)
  - Updating symfony/event-dispatcher (v4.0.2 => v4.0.4)
  - Updating symfony/debug (v4.0.2 => v4.0.4)
  - Updating symfony/http-kernel (v4.0.2 => v4.0.4)
  - Updating symfony/dependency-injection (v4.0.2 => v4.0.4)
  - Updating symfony/routing (v4.0.2 => v4.0.4)
  - Updating symfony/finder (v4.0.2 => v4.0.4)
  - Updating symfony/filesystem (v4.0.2 => v4.0.4)
  - Updating symfony/config (v4.0.2 => v4.0.4)
  - Updating symfony/cache (v4.0.2 => v4.0.4)
  - Updating symfony/polyfill-apcu (v1.6.0 => v1.7.0)
  - Updating symfony/framework-bundle (v4.0.2 => v4.0.4)
  - Updating sensio/framework-extra-bundle (v5.1.3 => v5.1.4)
  - Updating symfony/console (v4.0.2 => v4.0.4)
  - Updating sensiolabs/security-checker (v4.1.6 => v4.1.7)
  - Updating symfony/asset (v4.0.2 => v4.0.4)
  - Updating symfony/expression-language (v4.0.2 => v4.0.4)
  - Updating symfony/inflector (v4.0.2 => v4.0.4)
  - Updating symfony/property-access (v4.0.2 => v4.0.4)
  - Updating symfony/options-resolver (v4.0.2 => v4.0.4)
  - Updating symfony/intl (v4.0.2 => v4.0.4)
  - Updating symfony/polyfill-intl-icu (v1.6.0 => v1.7.0)
  - Updating symfony/form (v4.0.2 => v4.0.4)
  - Updating symfony/security (v4.0.2 => v4.0.4)
  - Updating symfony/security-bundle (v4.0.2 => v4.0.4)
  - Updating symfony/translation (v4.0.2 => v4.0.4)
  - Updating symfony/validator (v4.0.2 => v4.0.4)
  - Updating symfony/yaml (v4.0.2 => v4.0.4)
  - Updating symfony/twig-bridge (v4.0.2 => v4.0.4)
  - Updating symfony/twig-bundle (v4.0.2 => v4.0.4)
  - Updating white-october/pagerfanta-bundle (v1.1.1 => v1.1.2)
  - Updating symfony/doctrine-bridge (v4.0.2 => v4.0.4)
  - Updating dama/doctrine-test-bundle (v4.0.1 => v4.0.2)
  - Updating symfony/stopwatch (v4.0.2 => v4.0.4)
  - Updating symfony/process (v4.0.2 => v4.0.4)
  - Updating symfony/polyfill-php72 (v1.6.0 => v1.7.0)
  - Updating php-cs-fixer/diff (v1.2.0 => v1.2.1)
  - Updating gecko-packages/gecko-php-unit (v3.0 => v3.1)
  - Updating friendsofphp/php-cs-fixer (v2.9.0 => v2.10.2)
  - Updating symfony/dom-crawler (v4.0.2 => v4.0.4)
  - Updating symfony/browser-kit (v4.0.2 => v4.0.4)
  - Updating symfony/css-selector (v4.0.2 => v4.0.4)
  - Updating symfony/var-dumper (v4.0.2 => v4.0.4)
  - Updating symfony/debug-bundle (v4.0.2 => v4.0.4)
  - Updating symfony/dotenv (v4.0.2 => v4.0.4)
  - Updating symfony/phpunit-bridge (v4.0.2 => v4.0.4)
  - Updating symfony/web-profiler-bundle (v4.0.2 => v4.0.4)
  - Updating symfony/web-server-bundle (v4.0.2 => v4.0.4)
  - Updating symfony/monolog-bridge (v4.0.2 => v4.0.4)

Commits
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0dc1486 Updated dependencies to Symfony 4.0.4

Author: javiereguiluz