Update dependencies

[Stoakes]

Package operations: 0 installs, 24 updates, 0 removals
  - Updating symfony/polyfill-ctype (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/polyfill-mbstring (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/polyfill-php70 (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/polyfill-util (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/polyfill-php56 (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/symfony (v3.4.17 => v3.4.20): Loading from cache
  - Updating symfony/polyfill-intl-icu (v1.9.0 => v1.10.0): Loading from cache
  - Updating symfony/polyfill-apcu (v1.9.0 => v1.10.0): Loading from cache
  - Updating psr/log (1.0.2 => 1.1.0): Loading from cache
  - Updating doctrine/persistence (v1.0.1 => v1.1.0): Loading from cache
  - Updating doctrine/common (v2.9.0 => v2.10.0): Loading from cache
  - Updating doctrine/dbal (v2.8.0 => v2.9.0): Loading from cache
  - Updating doctrine/doctrine-cache-bundle (1.3.3 => 1.3.5): Loading from cache
  - Updating doctrine/doctrine-bundle (1.9.1 => 1.10.0): Loading from cache
  - Updating doctrine/doctrine-migrations-bundle (v1.3.1 => v1.3.2): Loading from cache
  - Updating twig/extensions (v1.5.2 => v1.5.4): Loading from cache
  - Updating doctrine/orm (v2.6.2 => v2.6.3): Loading from cache
  - Updating easycorp/easyadmin-bundle (v1.17.14 => v1.17.18): Loading from cache
  - Updating sensiolabs/security-checker (v4.1.8 => v5.0.1): Loading from cache
  - Updating sensio/distribution-bundle (v5.0.22 => v5.0.23): Loading from cache
  - Updating monolog/monolog (1.23.0 => 1.24.0): Loading from cache
  - Updating symfony/monolog-bundle (v3.3.0 => v3.3.1): Loading from cache
  - Updating symfony/phpunit-bridge (v3.4.17 => v3.4.20): Loading from cache
  - Updating jms/metadata (1.6.0 => 1.7.0): Loading from cache