Upgrade premailer-rails from 1.9.0 to 1.9.2
Upgrade premailer-rails from 1.9.0 to 1.9.2

Includes compatibility with Rails 5.

Changelog:
https://github.com/fphilipe/premailer-rails/blob/master/CHANGELOG.md#v19
2

Working towards #14286.

dreampet/gitlab,stoplightio/gitlabhq,daiyu/gitlab-zh,martijnvermaat/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,openwide-java/gitlabhq,dwrensha/gitlabhq,Soullivaneuh/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,darkrasid/gitlabhq,htve/GitlabForChinese,stoplightio/gitlabhq,screenpages/gitlabhq,dplarson/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,daiyu/gitlab-zh,screenpages/gitlabhq,axilleas/gitlabhq,SVArago/gitlabhq,daiyu/gitlab-zh,axilleas/gitlabhq,allysonbarros/gitlabhq,htve/GitlabForChinese,Soullivaneuh/gitlabhq,mr-dxdy/gitlabhq,darkrasid/gitlabhq,icedwater/gitlabhq,LUMC/gitlabhq,allysonbarros/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,SVArago/gitlabhq,dreampet/gitlab,dwrensha/gitlabhq,mr-dxdy/gitlabhq,shinexiao/gitlabhq,t-zuehlsdorff/gitlabhq,martijnvermaat/gitlabhq,SVArago/gitlabhq,htve/GitlabForChinese,larryli/gitlabhq,icedwater/gitlabhq,iiet/iiet-git,openwide-java/gitlabhq,dplarson/gitlabhq,Soullivaneuh/gitlabhq,LUMC/gitlabhq,larryli/gitlabhq,LUMC/gitlabhq,mmkassem/gitlabhq,t-zuehlsdorff/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,mr-dxdy/gitlabhq,dplarson/gitlabhq,jirutka/gitlabhq,dwrensha/gitlabhq,openwide-java/gitlabhq,axilleas/gitlabhq,allysonbarros/gitlabhq,dplarson/gitlabhq,dwrensha/gitlabhq,jirutka/gitlabhq,martijnvermaat/gitlabhq,axilleas/gitlabhq,screenpages/gitlabhq,shinexiao/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,icedwater/gitlabhq,martijnvermaat/gitlabhq,allysonbarros/gitlabhq,stoplightio/gitlabhq,larryli/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,daiyu/gitlab-zh,mmkassem/gitlabhq,screenpages/gitlabhq,htve/GitlabForChinese,shinexiao/gitlabhq,mr-dxdy/gitlabhq,shinexiao/gitlabhq,larryli/gitlabhq,iiet/iiet-git,LUMC/gitlabhq,iiet/iiet-git,SVArago/gitlabhq