.rubocop.yml in isolator-0.4.0 vs .rubocop.yml in isolator-0.5.0

- old
+ new

@@ -15,11 +15,11 @@
     - 'Rakefile'
     - 'Gemfile'
     - '*.gemspec'
   DisplayCopNames: true
   StyleGuideCopsOnly: false
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.2.2
 
 Rails:
   Enabled: false
 
 Bundler/OrderedGems:
@@ -58,5 +58,8 @@
   Max: 100
 
 Metrics/BlockLength:
   Exclude:
     - 'spec/**/*.rb'
+
+Style/MutableConstant:
+  Enabled: false