Update Composer dependencies (2/27/2017)

```
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Removing mustangostang/spyc (0.6.1)
  - Installing mustangostang/spyc (0.6.2)
    Downloading: 100%

  - Removing phpunit/php-timer (1.0.8)
  - Installing phpunit/php-timer (1.0.9)
    Downloading: 100%

Writing lock file
Generating autoload files
```

Author: danielbachhuber