Update development environment

- Add pry
- Require pry in testing
- Make Gemfile less brittle
- Print version of ActiveSupport we are testing against

Author: Tom Scott

redis-activesupport.gemspec

@@ -30,4 +30,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'connection_pool', '~> 2.2.0'
   s.add_development_dependency 'redis-store-testing'
   s.add_development_dependency 'appraisal', '~> 2.0'
+  s.add_development_dependency 'pry-byebug', '~> 3'
 end

test/test_helper.rb

@@ -4,4 +4,4 @@
 require 'active_support'
 require 'active_support/cache/redis_store'
 
-puts "Testing against ActiveSupport v.#{ActiveSupport::VERSION::STRING}"
+puts "Testing against ActiveSupport v#{ActiveSupport::VERSION::STRING}"