Update the coverage to use the coveralls gem

googleauth.gemspec

@@ -34,6 +34,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'bundler', '~> 1.7'
   s.add_development_dependency 'simplecov', '~> 0.9.2'
+  s.add_development_dependency 'coveralls', '~> 0.7.11'
   s.add_development_dependency 'rake', '~> 10.0'
   s.add_development_dependency 'rubocop', '~> 0.28.0'
   s.add_development_dependency 'rspec', '~> 3.0'

spec/spec_helper.rb

@@ -35,12 +35,17 @@ $LOAD_PATH.unshift(spec_dir)
 $LOAD_PATH.unshift(lib_dir)
 $LOAD_PATH.uniq!
 
+# set up coverage
+require 'simplecov'
+require 'coveralls'
+
+SimpleCov.formatter = Coveralls::SimpleCov::Formatter
+SimpleCov.start
+
 require 'faraday'
 require 'rspec'
 require 'logging'
 require 'rspec/logging_helper'
-require 'simplecov'
-SimpleCov.start
 
 # Allow Faraday to support test stubs
 Faraday::Adapter.load_middleware(:test)