Update Composer dependencies (2018-10-03)

```
Loading composer repositories with package information
Updating dependencies (including require-dev)
The "http://packagist.org/p/provider-2014%249bc89e987e0d0c9802cf5a040379ac740ed6d0949e8eac49c6c282702462f569.json" file could not be downloaded: failed to open stream: Connection timed out
http://packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date
Package operations: 0 installs, 3 updates, 0 removals
  - Updating wp-cli/extension-command (v2.0.1 => v2.0.2): Downloading (100%)
  - Updating wp-cli/wp-cli dev-master (33dc4d2 => 174a897):  Checking out 174a897c61
Writing lock file
Generating autoload files
PHP CodeSniffer Config installed_paths set to ../../wp-coding-standards/wpcs/,../../phpcompatibility/phpcompatibility-wp/,../../phpcompatibility/php-compatibility/
```

Author: wp-make-coffee