Bump gem minor version
Bump gem minor version

We have removed the contactotron models. Strictly speaking this is
a breaking change which warrants a major bump, but as nobody has
been using contactotron for a Long Time, I felt it only deserved
a minor bump.

dinuksha/Test,theodi/govuk_content_models,dinuksha/Test,theodi/govuk_content_models,alphagov/govuk_content_models