Revert "Don't use 1.9.2 anymore."

This reverts commit 28960b27a469f96184a22fda36b68a82b2e64d06.
Merge branch 'master' of github.com:haihappen/mongoid-paranoia
Revert "Revert "Don't use 1.9.2 anymore.""

This reverts commit 7757189e467157557643903f28ece02f7abaf345.