Update WP-CLI to v0.19.2
Update WP-CLI to v0.19.2

Closes #1808.

Signed-off-by: Alan Ivey <ee249fd9166eccef852f50ca0cbb6ff8665afe99@gmail.com>

ablyler/homebrew-php,mkalkbrenner/homebrew-php,dguyon/homebrew-php,TomK/homebrew-php,philcook/homebrew-php