brew-php-switcher 1.6
brew-php-switcher 1.6

Update brew php switcher to 1.6. Includes support for PHP 7.1

Closes #3513.

Signed-off-by: Jan Viljanen <78474235ba423d1a061bae6ab658873ced03ce9c@greenpeace.org>

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