Update rubocop

Author: csfrancis

Diff for: .rubocop.yml

@@ -26,3 +26,10 @@ Style/TrailingCommaInLiteral:
 
 Style/TrivialAccessors:
   AllowPredicates: true
+
+Metrics/BlockLength:
+  Exclude:
+    - 'benchmark/setup_db.rb'
+    - '**/*.rake'
+    - 'spec/spec_helper.rb'
+    - 'spec/**/*_spec.rb'

Diff for: .rubocop_todo.yml

@@ -19,11 +19,6 @@ Layout/IndentHeredoc:
 Metrics/AbcSize:
   Max: 90
 
-# Offense count: 31
-# Configuration parameters: CountComments, ExcludedMethods.
-Metrics/BlockLength:
-  Max: 860
-
 # Offense count: 1
 # Configuration parameters: CountBlocks.
 Metrics/BlockNesting: