Fix bundler args in travis.

Author: gkellogg

.travis.yml

@@ -1,5 +1,4 @@
 language: ruby
-bundler_args: --without debug
 script: "bundle exec rspec spec"
 env:
   - CI=true

Gemfile

@@ -17,6 +17,6 @@ group :development, :test do
   gem 'rdf-vocab',      git: "https://github.com/ruby-rdf/rdf-vocab",       branch: "develop"
   gem 'sxp',            git: "https://github.com/dryruby/sxp.rb",           branch: "develop"
   gem "redcarpet",      platforms: :ruby
-  gem 'simplecov',      require: false, platform: :mri
-  gem 'coveralls',      require: false, platform: :mri
+  gem 'simplecov',      platforms: :mri
+  gem 'coveralls',      '~> 0.8', platforms: :mri
 end