Adds debug gem to development/testing

Author: picandocodigo

elasticsearch-model/Gemfile

@@ -21,6 +21,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :development, :testing do
+  gem 'debug'
   gem 'pry-nav'
   gem 'rspec'
 end

elasticsearch-persistence/Gemfile

@@ -25,6 +25,7 @@ gem 'elasticsearch-model',
     require: false
 
 group :development, :testing do
+  gem 'debug'
   gem 'pry-nav'
   gem 'rspec'
 end

elasticsearch-rails/Gemfile

@@ -29,6 +29,7 @@ gem 'elasticsearch-persistence',
     require: false
 
 group :development, :testing do
+  gem 'debug'
   gem 'pry-nav'
   gem 'rspec'
   gem 'sqlite3' unless defined?(JRUBY_VERSION)