fixes ci issue with ruby 3.0.0

move pry gems into :test group & add rexml gem for ruby 3 (#237)

Author: mrlevitas

Gemfile

@@ -7,6 +7,9 @@ gem 'rake'
 group :development, :test do
   gem 'cucumber'
   gem 'faker', '~> 1.0'      # fix for breaking change in faker 2.x
+  gem 'pry-nav', require: true
+  gem 'pry-rescue', require: true
+  gem 'rexml'
   gem 'rspec'
   gem 'rubocop', '~> 0.50.0'
   gem 'simplecov', '~> 0.13' # fix for breaking change in simplecov
@@ -16,8 +19,6 @@ end
 group :development do
   gem 'guard-bundler', platforms: :mri
   gem 'guard-rspec', platforms: :mri
-  gem 'pry-nav', require: true
-  gem 'pry-rescue', require: true
 
   gem 'rb-fchange', require: false # Windows
   gem 'rb-fsevent', require: false # OS X