Merge pull request #3493 from alphagov/dependabot/bundler/connection_pool-2.5.0

Bump connection_pool from 2.4.1 to 2.5.0

Author: yndajas

Gemfile.lock

@@ -114,7 +114,7 @@ GEM
     climate_control (1.2.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.4)
-    connection_pool (2.4.1)
+    connection_pool (2.5.0)
     crack (1.0.0)
       bigdecimal
       rexml