Update Composer dependencies (2018-10-26)

```
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 1 update, 0 removals
  - Updating wp-cli/wp-cli dev-master (f105d0c => 1680c0d):  Checking out 1680c0de03
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