title: ActiveModel::UnknownAttributeError: unknown attribute 'foreign_type' for PaperTrail::VersionAssociation
body: <p>I am migrating my application from Rails4.2.8 to Rails5.2.3, updated paper-trail gem version '7.1.2' to '10.3.1'.I am using Rspec - 3.8.2. Everything worked fine but my specs are failing for models which used 'has_paper_trail' macro. </p>
  
  <p>Tried looking into my codes as well as gem repo, didn't found such attribute anywhere.</p>
  
  <p>Found some similar issue but it didn't helped.
  <a href="https://github.com/paper-trail-gem/paper_trail/issues/455" rel="noreferrer">https://github.com/paper-trail-gem/paper_trail/issues/455</a></p>
  
  <p><code>ActiveModel::UnknownAttributeError:unknown attribute 'foreign_type' for PaperTrail::VersionAssociation.</code></p>