Split RSpec related rubocop rules into a separate file

.rubocop.yml

@@ -1,3 +1,6 @@
+inherit_from:
+  - .rubocop_rspec.yml
+
 AllCops:
   NewCops: enable
   TargetRubyVersion: 2.6
@@ -722,7 +725,6 @@ AllCops:
 require:
   - rubocop-rails
   - rubocop-rake
-  - rubocop-rspec
 
 Layout/IndentationStyle:
   EnforcedStyle: tabs
@@ -734,19 +736,6 @@ Metrics/BlockLength:
   Exclude:
     - '**/*_spec.rb'
 
-RSpec/ExampleLength:
-  Max: 20
-
-RSpec/NestedGroups:
-  # we do this because I see no gain to being super restrictive
-  Max: 5
-
-RSpec/NotToNot:
-  Enabled: false
-
-RSpec/SharedExamples: 
-  Enabled: false
-
 Style/ClassAndModuleChildren:
   EnforcedStyle: compact
 

.rubocop_rspec.yml

@@ -0,0 +1,21 @@
+require:
+- rubocop-rspec
+
+RSpec/ExampleLength:
+  Max: 20
+
+RSpec/NestedGroups:
+  # we do this because I see no gain to being super restrictive
+  Max: 5
+
+RSpec/NotToNot:
+  Enabled: false
+
+RSpec/SharedExamples: 
+  Enabled: false
+
+RSpec/ImplicitSubject:
+  Enabled: false
+
+RSpec/MultipleMemoizedHelpers:
+  Max: 10