Merge pull request #645 from alphagov/dependabot/bundler/timecop-0.9.11

Bump timecop from 0.9.10 to 0.9.11

Author: stringiest

Gemfile.lock

@@ -549,7 +549,7 @@ GEM
     statsd-ruby (1.5.0)
     stringio (3.2.0)
     thor (1.5.0)
-    timecop (0.9.10)
+    timecop (0.9.11)
     tsort (0.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)