gabba warning: URI.escape is obsolete

[a-b]

gabba gem emitting a lot of warnings like:

2021-01-06T22:13:10.07+0000 [APP/PROC/WEB/1] ERR /home/vcap/deps/0/vendor_bundle/ruby/2.7.0/gems/gabba-1.0.1/lib/gabba/gabba.rb:350: warning: URI.escape is obsolete                                                    │
   2021-01-06T22:13:10.07+0000 [APP/PROC/WEB/1] ERR /home/vcap/deps/0/vendor_bundle/ruby/2.7.0/gems/gabba-1.0.1/lib/gabba/gabba.rb:350: warning: URI.escape is obsolete                                                    │
   2021-01-06T22:13:10.07+0000 [APP/PROC/WEB/1] ERR /home/vcap/deps/0/vendor_bundle/ruby/2.7.0/gems/gabba-1.0.1/lib/gabba/gabba.rb:350: warning: URI.escape is obsolete                                                    │

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/176388211

The labels on this github issue will be updated when the story is started.