Update Rubocop to support new thoughtbot defaults

One annoyance is that the thoughtbot defaults include the Rails
cops, which don't quite make sense here. I am forced into loading the
rubocop-rails gem but then disabling all of the cops in it.

.rubocop.yml

@@ -9,6 +9,9 @@ AllCops:
     - 'gemfiles/*'
     - 'tmp/**/*'
 
+Rails:
+  Enabled: false
+
 Metrics/BlockLength:
   CountComments: true
   Max: 25

Gemfile.lock

@@ -76,6 +76,7 @@ GEM
     parallel (1.19.1)
     parser (2.7.0.2)
       ast (~> 2.4.0)
+    rack (2.1.1)
     rainbow (3.0.0)
     rake (12.3.2)
     rspec (3.8.0)
@@ -94,15 +95,18 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
-    rubocop (0.68.0)
+    rubocop (0.79.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5, != 2.5.1.1)
+      parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.6)
-    rubocop-performance (1.3.0)
-      rubocop (>= 0.68.0)
+      unicode-display_width (>= 1.4.0, < 1.7)
+    rubocop-performance (1.5.2)
+      rubocop (>= 0.71.0)
+    rubocop-rails (2.4.1)
+      rack (>= 1.1)
+      rubocop (>= 0.72.0)
     ruby-progressbar (1.10.1)
     simplecov (0.16.1)
       docile (~> 1.1)
@@ -115,7 +119,7 @@ GEM
     thread_safe (0.3.6-java)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.5.0)
+    unicode-display_width (1.6.1)
     yard (0.9.20)
 
 PLATFORMS
@@ -132,8 +136,9 @@ DEPENDENCIES
   rake
   rspec
   rspec-its
-  rubocop (= 0.68)
+  rubocop
   rubocop-performance
+  rubocop-rails
   simplecov
   sqlite3
   yard

factory_bot.gemspec

@@ -31,8 +31,9 @@ Gem::Specification.new do |s|
   s.add_development_dependency("rake")
   s.add_development_dependency("rspec")
   s.add_development_dependency("rspec-its")
-  s.add_development_dependency("rubocop", "0.68")
+  s.add_development_dependency("rubocop")
   s.add_development_dependency("rubocop-performance")
+  s.add_development_dependency("rubocop-rails")
   s.add_development_dependency("simplecov")
   s.add_development_dependency("yard")
 

lib/factory_bot/internal.rb

@@ -2,11 +2,11 @@ module FactoryBot
   # @api private
   module Internal
     DEFAULT_STRATEGIES = {
-      build:          FactoryBot::Strategy::Build,
-      create:         FactoryBot::Strategy::Create,
+      build: FactoryBot::Strategy::Build,
+      create: FactoryBot::Strategy::Create,
       attributes_for: FactoryBot::Strategy::AttributesFor,
-      build_stubbed:  FactoryBot::Strategy::Stub,
-      null:           FactoryBot::Strategy::Null,
+      build_stubbed: FactoryBot::Strategy::Stub,
+      null: FactoryBot::Strategy::Null,
     }.freeze
 
     DEFAULT_CALLBACKS = [