Merge pull request #1305 from alphagov/dependabot/bundler/plek-5.2.1

Author: govuk-ci

Gemfile.lock

@@ -526,7 +526,7 @@ GEM
     parser (3.3.7.0)
       ast (~> 2.4.1)
       racc
-    plek (5.2.0)
+    plek (5.2.1)
     pp (0.6.2)
       prettyprint
     prettyprint (0.2.0)