upgrade to minitest 5

Author: tenderlove

rugged.gemspec

@@ -30,5 +30,5 @@ for testing and using the libgit2 library in a language that is awesome.
 desc
   s.add_development_dependency "rake-compiler", ">= 0.9.0"
   s.add_development_dependency "pry"
-  s.add_development_dependency "minitest", "~> 3.0"
+  s.add_development_dependency "minitest", "~> 5.0"
 end

test/test_helper.rb

@@ -5,7 +5,7 @@
 require 'pp'
 
 module Rugged
-  class TestCase < MiniTest::Unit::TestCase
+  class TestCase < Minitest::Test
     # Automatically clean up created fixture repos after each test run
     def after_teardown
       Rugged::TestCase::FixtureRepo.teardown