Fix RuboCop CI warnings

Author: gildesmarais

.rubocop.yml

@@ -1,4 +1,4 @@
-require:
+plugins:
   - rubocop-rspec
   - rubocop-performance
 

bin/rspec_changed_configs

@@ -13,8 +13,8 @@ def comment_only_change?(file)
 end
 
 changed_files = `git diff --name-only origin/master`
-  .split("\n")
-  .grep(CONFIG_PATH)
+                .split("\n")
+                .grep(CONFIG_PATH)
 
 test_files = changed_files.reject { |file| comment_only_change?(file) }
 

bin/validate_configs

@@ -26,7 +26,7 @@ rescue Psych::Exception => error
   warn "       parse: #{error.message}"
   failed << file
 rescue StandardError => error
-    puts "FAIL #{file}"
+  puts "FAIL #{file}"
   warn "       validation: #{error.class}: #{error.message}"
   failed << file
 end