Revert "Update gems and set version for prawn"

This reverts commit 799fea149f01643e71077bae5b5639f2d4aa7667.
Revert "rest: install gibberish and update Gemfile.lock"

This reverts commit ce06867dd83c5d8a2470dc26dd4bcb6bddc2c29c.
Revert "Move gibbersh to Gemfile.shared"

This reverts commit fcbdfd2749c8d9598b726a5cf20e5107936ce4ed.
rest: install gibberish