Rakefile in mutator-0.1.0 vs Rakefile in mutator-0.2.0

@@ -1,6 +1,6 @@
 require "bundler/gem_tasks"
 require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
+task default: :spec