Add rubocop-performance

Author: Joel Lefkowitz

.rubocop.yml

@@ -1,4 +1,5 @@
 require:
+  - rubocop-performance
   - rubocop-rspec
 
 AllCops:
@@ -7,4 +8,3 @@ AllCops:
 RSpec/ExampleLength:
   Enabled: false
   Max: 10
-

Gemfile

@@ -10,6 +10,7 @@ group :development do
   gem 'byebug', '~> 11.1.3'
   gem 'rspec', '~> 3.10.0'
   gem 'rubocop', '~> 1.57.2'
+  gem 'rubocop-performance', '~> 1.21.0'
   gem 'rubocop-rspec', '~> 3.0.0'
   gem 'yard', '~> 0.9.37'
 end

Gemfile.lock

@@ -28,7 +28,7 @@ GEM
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     parallel (1.24.0)
-    parser (3.2.2.4)
+    parser (3.3.7.2)
       ast (~> 2.4.1)
       racc
     public_suffix (4.0.7)
@@ -60,8 +60,11 @@ GEM
       rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
-      parser (>= 3.2.1.0)
+    rubocop-ast (1.41.0)
+      parser (>= 3.3.7.2)
+    rubocop-performance (1.21.1)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rspec (3.0.0)
       rubocop (~> 1.40)
     ruby-progressbar (1.13.0)
@@ -88,6 +91,7 @@ DEPENDENCIES
   octokit (~> 4.25.0)
   rspec (~> 3.10.0)
   rubocop (~> 1.57.2)
+  rubocop-performance (~> 1.21.0)
   rubocop-rspec (~> 3.0.0)
   yard (~> 0.9.37)