switch to minitest/autorun

Made the changes recommended below and stuff worked on my ruby 2.1.1 install...

    alzabo:~/code/easyparser (master) $ rake
    Warning: you should require 'minitest/autorun' instead.
    Warning: or add 'gem "minitest"' before 'require "minitest/autorun"'
    From:
      /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit.rb:1:in `<top (required)>'
      /Users/seamusabshere/code/easyparser/test/test_easyparser.rb:1:in `<top (required)>'
      /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:10:in `block (2 levels) in <main>'
      /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:9:in `each'
      /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:9:in `block in <main>'
      /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:4:in `select'
      /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:4:in `<main>'
    MiniTest::Unit::TestCase is now Minitest::Test. From /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit/testcase.rb:8:in `<module:Unit>'
    /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit.rb:676:in `<class:Runner>': undefined method `_run_suite' for class `Test::Unit::Runner' (NameError)
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit.rb:261:in `<module:Unit>'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit.rb:15:in `<module:Test>'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/test/unit.rb:7:in `<top (required)>'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from /Users/seamusabshere/code/easyparser/test/test_easyparser.rb:1:in `<top (required)>'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from /Users/seamusabshere/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:10:in `block (2 levels) in <main>'
      from /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:9:in `each'
      from /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:9:in `block in <main>'
      from /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:4:in `select'
      from /Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb:4:in `<main>'
    rake aborted!
    Command failed with status (1): [ruby -I"lib:test" -I"/Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib" "/Users/seamusabshere/.rvm/gems/ruby-2.1.1/gems/rake-10.2.2/lib/rake/rake_test_loader.rb" "test/test*.rb" ]

    Tasks: TOP => default => test
    (See full trace by running task with --trace)
    alzabo:~/code/easyparser (master) $