Merge pull request #485 from ruby/dependabot/bundler/rubocop-tw-1.48.1

Update rubocop requirement from ~> 1.12.1 to ~> 1.48.1

Author: matzbot

Gemfile

@@ -6,5 +6,5 @@ group :development do
   gem "bundler"
   gem "minitest", "5.18.0"
   gem "coveralls"
-  gem "rubocop", "~> 1.12.1"
+  gem "rubocop", "~> 1.48.1"
 end