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

@@ -1,7 +1,11 @@
 Metrics/AbcSize:
   Max: 20
 
+Metrics/ClassLength:
+  Exclude:
+  - 'test/**/*'
+
 Metrics/LineLength:
   Max: 100
   AllowURI: true
   URISchemes:
   - http