Better specify dependencies

- Rails 5 breaks old rubies
- nokogiri is used by specs
- coveralls *should* be used by developers, not just test

Gemfile

@@ -7,9 +7,5 @@ group :test, :development do
   gem 'rubocop', require: false
   gem 'rubocop-rspec', require: false
   gem 'pry-byebug', require: false, platform: [:ruby_20, :ruby_21]
-end
-
-group :test do
   gem 'coveralls', require: false
-#  gem 'pry-byebug', require: false
 end

stanford-mods.gemspec

@@ -12,29 +12,20 @@ Gem::Specification.new do |gem|
 
   gem.extra_rdoc_files = ["LICENSE", "README.md"]
   gem.files         = `git ls-files`.split($\)
-  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.executables   = gem.files.grep(%r{^bin/}).map { |f| File.basename(f) }
   gem.test_files    = gem.files.grep(%r{^spec/})
   gem.require_paths = ["lib"]
 
   gem.add_dependency 'mods', '~> 2.0.2'
   # active_support for .ordinalize, eg. 1 -> 1st, 2 -> 2nd for centuries
-  gem.add_dependency 'activesupport'
-
-  # Runtime dependencies
-  # gem.add_runtime_dependency 'nokogiri'
+  gem.add_dependency 'activesupport', '~> 4.2'
 
   # Development dependencies
   # Bundler WILL install these gems too if you've checked out from git and run 'bundle install'
   # Bundler WILL NOT add these as dependencies if you gem install or add this gem to your Gemfile
-  gem.add_development_dependency "rake"
-  # docs
-  gem.add_development_dependency "rdoc"
-  gem.add_development_dependency "yard"
-  # tests
+  gem.add_development_dependency 'rake'
+  gem.add_development_dependency 'rdoc'
+  gem.add_development_dependency 'yard'
   gem.add_development_dependency 'rspec'
-  # using coveralls with travis now
-  # gem.add_development_dependency 'simplecov'
-  # gem.add_development_dependency 'simplecov-rcov'
-  # gem.add_development_dependency 'ruby-debug19'
-
+  gem.add_development_dependency 'nokogiri'
 end