Update Composer dependencies (2018-10-19)

```
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 2 updates, 0 removals
  - Updating composer/ca-bundle (1.1.2 => 1.1.3): Downloading (100%)
  - Updating wp-cli/wp-cli dev-master (b167a4a => ab17f1a):  Checking out ab17f1ae28
Writing lock file
Generating autoload files
PHP CodeSniffer Config installed_paths set to ../../phpcompatibility/php-compatibility/,../../wp-coding-standards/wpcs/,../../phpcompatibility/phpcompatibility-wp/
```

Author: wp-make-coffee