Update Composer dependencies (3/10/2017)

```
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 14 updates, 0 removals
  - Updating symfony/yaml (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/filesystem (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/config (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/debug (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/dependency-injection (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/event-dispatcher (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/translation (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/process (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/finder (v2.8.17 => v2.8.18): Loading from cache
  - Updating symfony/console (v2.8.17 => v2.8.18): Loading from cache
  - Updating seld/jsonlint (1.5.0 => 1.6.0): Loading from cache
  - Updating justinrainbow/json-schema (4.1.0 => 5.1.0): Loading from cache
  - Updating composer/ca-bundle (1.0.6 => 1.0.7): Loading from cache
  - Updating composer/composer (1.3.2 => 1.4.1): Loading from cache
Writing lock file
Generating autoload files
```

Author: danielbachhuber