Add rubocop-minitest, rubocop-performance, and rubocop-rake

Author: sferik

.rubocop.yml

@@ -1,3 +1,8 @@
+require:
+ - rubocop-minitest
+ - rubocop-performance
+ - rubocop-rake
+
 AllCops:
   DisplayCopNames: true
   NewCops: enable

Gemfile

@@ -16,6 +16,9 @@ end
 
 group :development do
   gem "rubocop"
+  gem "rubocop-minitest"
+  gem "rubocop-performance"
+  gem "rubocop-rake"
   gem "sprockets"
   gem "uglifier"
   gem "yui-compressor"

Gemfile.lock

@@ -45,6 +45,14 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
+    rubocop-minitest (0.34.2)
+      rubocop (>= 1.39, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+    rubocop-performance (1.20.1)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+    rubocop-rake (0.6.0)
+      rubocop (~> 1.0)
     ruby-progressbar (1.13.0)
     simplecov_json_formatter (0.1.4)
     sprockets (4.2.1)
@@ -63,6 +71,9 @@ DEPENDENCIES
   minitest
   rake (>= 11)
   rubocop
+  rubocop-minitest
+  rubocop-performance
+  rubocop-rake
   simplecov!
   simplecov-html!
   sprockets