DEV: Add missing Rubocop gem dependencies due to changes in discourse config

DEV: Add missing Rubocop gem dependencies due to changes in discourse config

diff --git a/.rubocop.yml b/.rubocop.yml
index 0ca7eff..9a14130 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1 +1,2 @@
-inherit_from: https://raw.githubusercontent.com/discourse/discourse/master/.rubocop.yml
+inherit_gem:
+  rubocop-discourse: .rubocop.yml
diff --git a/Gemfile b/Gemfile
index 21b714a..d2924dc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,8 +20,11 @@ group :test, :development do
   gem 'byebug'
 end
 
+group :development do
+  gem 'yard'
+  gem 'rubocop-discourse', require: false
+  gem 'rubocop-rspec', require: false
+end
+
 gem 'rack'
 gem 'concurrent-ruby' # for distributed-cache
-
-gem 'rubocop'
-gem 'yard'

GitHub sha: a26c9d0d