phpdocumentor 2.9.0
phpdocumentor 2.9.0

Provides PHP 7.0 compatibility

Closes #3452.

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

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