[ci] preparations

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: 0exp

Rakefile

@@ -2,11 +2,20 @@
 
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
-
-RSpec::Core::RakeTask.new(:spec)
-
+require 'rubocop'
 require 'rubocop/rake_task'
+require 'rubocop-performance'
+require 'rubocop-rspec'
+require 'rubocop-rake'
+
+RuboCop::RakeTask.new(:rubocop) do |t|
+  config_path = File.expand_path(File.join('.rubocop.yml'), __dir__)
+  t.options = ['--config', config_path]
+  t.requires << 'rubocop-rspec'
+  t.requires << 'rubocop-performance'
+  t.requires << 'rubocop-rake'
+end
 
-RuboCop::RakeTask.new
+RSpec::Core::RakeTask.new(:rspec)
 
-task default: %i[spec rubocop]
+task default: :rspec