Use built-in Steep Rake task

Author: sferik

Gemfile

@@ -17,5 +17,5 @@ gem "rubocop-performance", ">= 1.18"
 gem "rubocop-rake", ">= 0.6"
 gem "simplecov", ">= 0.22"
 gem "standard", ">= 1.35.1"
-gem "steep", ">= 1.5.3"
+gem "steep", ">= 1.10"
 gem "webmock", ">= 3.18.1"

Rakefile

@@ -13,13 +13,9 @@ require "rubocop/rake_task"
 
 RuboCop::RakeTask.new
 
-require "steep"
-require "steep/cli"
+require "steep/rake_task"
 
-desc "Type check with Steep"
-task :steep do
-  Steep::CLI.new(argv: ["check"], stdout: $stdout, stderr: $stderr, stdin: $stdin).run
-end
+Steep::RakeTask.new(:steep)
 
 require "mutant"