.rubocop.yml in cose-0.7.0 vs .rubocop.yml in cose-0.8.0

@@ -1,8 +1,17 @@
+require:
+  - rubocop-performance
+
+inherit_mode:
+  merge:
+    - Exclude
+
 AllCops:
   TargetRubyVersion: 2.2
   DisabledByDefault: true
+  Exclude:
+    - "gemfiles/**/*"
 
 Bundler:
   Enabled: true
 
 Gemspec:
@@ -26,9 +35,12 @@
 
 Security:
   Enabled: true
 
 Style/FrozenStringLiteralComment:
+  Enabled: true
+
+Style/HashSyntax:
   Enabled: true
 
 Style/RedundantFreeze:
   Enabled: true