Support Ruby 3.0

Author: hsbt

Rakefile

@@ -2,7 +2,7 @@ require "bundler/gem_tasks"
 require "rake/testtask"
 
 Rake::TestTask.new(:test) do |t|
-  t.libs << "test/lib"
+  t.libs << "lib" << "test/lib"
   t.ruby_opts << "-rhelper"
   t.test_files = FileList["test/**/test_*.rb"]
 end

test/pathname/test_pathname.rb

@@ -1288,11 +1288,12 @@ def test_s_glob
   end
 
   def test_s_glob_3args
+    expect = RUBY_VERSION > "3.1" ? [Pathname("."), Pathname("f")] : [Pathname("."), Pathname(".."), Pathname("f")]
     with_tmpchdir('rubytest-pathname') {|dir|
       open("f", "w") {|f| f.write "abc" }
       Dir.chdir("/") {
         assert_equal(
-          [Pathname("."), Pathname("f")],
+          expect,
           Pathname.glob("*", File::FNM_DOTMATCH, base: dir).sort)
       }
     }