Bump ruby version to 2.2.x
Bump ruby version to 2.2.x

This bumps the versions used to run the tests, and build the packages

froddd/govuk_template,daveraine/govuk_template,jonheslop/govuk_template,quis/govuk_template,alphagov/govuk_template,daveraine/govuk_template,robinwhittleton/govuk_template,jonheslop/govuk_template,froddd/govuk_template,jonheslop/govuk_template,alphagov/govuk_template,jonheslop/govuk_template,quis/govuk_template,robinwhittleton/govuk_template,froddd/govuk_template,daveraine/govuk_template,robinwhittleton/govuk_template,alphagov/govuk_template,alphagov/govuk_template,robinwhittleton/govuk_template,daveraine/govuk_template,jonheslop/govuk_template,robinwhittleton/govuk_template,quis/govuk_template,quis/govuk_template,froddd/govuk_template,alphagov/govuk_template,quis/govuk_template,froddd/govuk_template