Extend README (Installation and Usage) [ci skip]
Extend README (Installation and Usage) [ci skip]

geniou/rubocop-rspec,backus/rubocop-rspec,tjchambers/rubocop-rspec,nevir/rubocop-rspec,andyw8/rubocop-rspec,andyw8/rubocop-rspec,backus/rubocop-rspec,jasnow/rubocop-rspec,mjgiarlo/rubocop-rspec,mlarraz/rubocop-rspec,bquorning/rubocop-rspec