Vsevolod Voloshyn

Another issue with this cop: `str.#{selector} == ('string')` `str.#{selector} != ('string')` Both lines above return the same offence message. Checkout lines: https://github.com/rubocop/rubocop-performance/blob/219bf570999d291ef657de97792b493e43f42393/spec/rubocop/cop/performance/casecmp_spec.rb#L19 https://github.com/rubocop/rubocop-performance/blob/219bf570999d291ef657de97792b493e43f42393/spec/rubocop/cop/performance/casecmp_spec.rb#L41

Same issue

`gem 'json_matchers', '0.10.0'` seems the fastest one version of that gem