No longer require zlib
No longer require zlib

[ci skip]

controlshift/premailer-rails,uswitch/premailer-rails,doorkeeper/premailer-rails,doorkeeper/premailer-rails,fphilipe/premailer-rails,fphilipe/premailer-rails,controlshift/premailer-rails,fphilipe/premailer-rails,uswitch/premailer-rails,controlshift/premailer-rails