Required Ruby 3.1 minimum

Set stricter dependency related to Ruby 3
 it helps with CI stability
Add more description to Rakefile
  in order to display the target with `rake --task`

Author: jvmvik

Rakefile

@@ -1,18 +1,26 @@
+# Automate serpapi ruby gem end to end
+#
+# rake --task
+#
+# main targets:
+#
+# rake dependency # to install dependency
+# rake oobt # pre
+#
+
 require 'rake'
 require 'rspec/core/rake_task'
 require 'rubocop/rake_task'
 require 'yard'
 require_relative 'lib/serpapi'
 
-task :check do
-  if ENV['API_KEY']
-    puts 'check: found $API_KEY'
-  else
-    puts 'check: API_KEY must be defined'
-    exit 1
-  end
-end
+desc "run out of box testing using the local gem file pre-release"
+task oobt: %i[check readme doc check build install demo]
 
+desc "execute all the steps except release"
+task default: %i[check dependency version readme doc build test oobt]
+
+desc "update README.md from the template"
 task readme: ['README.md.erb'] do
   `erb -T '-' README.md.erb > README.md`
 end
@@ -32,45 +40,56 @@ RuboCop::RakeTask.new(:lint) do |t|
   t.options = ['--display-cop-names']
 end
 
+desc "format ruby code using rubocop"
+task :format do
+  sh('rubocop --auto-correct')
+end
+
+desc 'install project dependencies'
 task :dependency do
   sh 'bundle install'
 end
 
+desc 'build serpapi library as a gem'
 task :build do
   sh 'gem build serpapi'
 end
 
+desc 'install serpapi library from the .gem'
 task :install do
   sh "gem install ./serpapi-#{SerpApi::VERSION}.gem"
 end
 
+desc 'run demo example'
 task :demo do
   sh 'ruby oobt/demo.rb'
 end
 
+desc 'release the gem to the public rubygems.org'
+task release: [:oobt] do
+  sh 'gem push `ls -t1 *.gem | head -1`'
+  puts 'release public on: https://rubygems.org/gems/serpapi/versions'
+end
+
+# private
+task :check do
+  if ENV['API_KEY']
+    puts 'check: found $API_KEY'
+  else
+    puts 'check: API_KEY must be defined'
+    exit 1
+  end
+end
+
+desc 'print current version'
 task :version do
   puts 'current version: ' + SerpApi::VERSION
 end
 
+desc 'create a tag'
 task :tag do
   version = SerpApi::VERSION
   puts "create git tag #{version}"
   sh "git tag #{version}"
   puts "now publish the tag:\n$ git push origin #{version}"
-end
-
-task release: [:oobt] do
-  sh 'gem push `ls -t1 *.gem | head -1`'
-  puts 'release public on: https://rubygems.org/gems/serpapi/versions'
-end
-
-desc "run out of box testing using the gem file"
-task oobt: %i[readme doc check build install demo]
-
-desc "execute all the steps"
-task default: %i[dependency version readme doc build test oobt]
-
-desc "format ruby code using rubocop"
-task :format do
-  sh('rubocop --auto-correct')
 end

serpapi.gemspec

@@ -20,15 +20,15 @@ end
   s.require_paths = ['lib']
   s.homepage    = 'https://github.com/serpapi/serpapi-ruby'
   s.license     = 'MIT'
-  s.required_ruby_version = '>= 1.9'
+  s.required_ruby_version = '>= 3.1'
 
   # faraday
   s.add_dependency 'faraday', '~> 2.13'
 
   # development dependency
-  s.add_development_dependency 'rake'
-  s.add_development_dependency 'rspec'
-  s.add_development_dependency 'yard'
-  s.add_development_dependency 'rubocop'
+  s.add_development_dependency 'rake', '~> 13.2.1'
+  s.add_development_dependency 'rspec', '~>3.11'
+  s.add_development_dependency 'yard', '~>0.9.28'
+  s.add_development_dependency 'rubocop', '~>1.75.7'
 
 end