rake: Support task arguments and sh with env hash (#765)

* Support rake task arguments within task block

* Support env hash to FileUtils#sh in rake

gems/rake/13.0/_test/test.rb

@@ -10,5 +10,23 @@ def create_task
     task :test do
       ruby "test/unittest.rb"
     end
+
+    task :test_with_1_arg, :name do |t, args|
+      value = args[:name]
+      puts "#{args[:name]}=#{value}"
+    end
+
+    task :test_with_2_args, %i[name1 name2] do |t, args|
+      args.each do |name, value|
+        puts "#{name}=#{value}"
+      end
+    end
+
+    task :test_with_sh do
+      sh "ruby test/unittest_without_env.rb"
+
+      env = { "RACK_ENV" => "test" }
+      sh env, "ruby test/unittest_with_env.rb"
+    end
   end
 end

gems/rake/13.0/rake.rbs

@@ -3,6 +3,16 @@ module Rake
     include Rake::DSL
   end
 
+  class Task
+  end
+
+  class TaskArguments
+    include Enumerable[untyped]
+
+    def []: (untyped index) -> untyped
+    def each: () ?{ (untyped, untyped) -> void } -> void
+  end
+
   module DSL
     private
 
@@ -16,12 +26,13 @@ module Rake
     def multitask: (*untyped args) ?{ () -> void } -> void
     def namespace: (?untyped name) ?{ () -> void } -> void
     def rule: (*untyped args) ?{ () -> void } -> void
-    def task: (*untyped args) ?{ () -> void } -> void
+    def task: (*untyped args) ?{ (Rake::Task, Rake::TaskArguments) -> void } -> void
   end
 end
 
 module FileUtils
   def sh: (*String cmd, **untyped options) ?{ (bool, Process::Status) -> void } -> void
+    | (Hash[String, String] env, *String cmd, **untyped options) ?{ (bool, Process::Status) -> void } -> void
   def ruby: (*String args, **untyped options) ?{ (bool, Process::Status) -> void } -> void
   def safe_ln: (*untyped args, **untyped options) -> void
   def split_all: (String path) -> Array[String]