build.yml in webhook_system-2.3.1

- old
+ new

@@ -14,21 +14,19 @@
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
         ruby:
+          - 2.7
           - 2.6
           - 2.5
         gemfile:
           - rails_4.2
           - rails_5.0
           - rails_5.1
           - rails_5_2
           - rails_6.0
-          # expected WebhookSystem::Job::RequestFailed with "POST request to http://lvh.me/hook1 failed with code: 400 and error I don't like you", got #<NameError: uninitialized constant ActiveSupport::Testing::Assertions::Minitest> with backtrace:
-          # ./vendor/bundle/ruby/2.6.0/gems/activesupport-6.1.4/lib/active_support/testing/assertions.rb:36:in `rescue in assert_nothing_raised'
-          # ./vendor/bundle/ruby/2.6.0/gems/activesupport-6.1.4/lib/active_support/testing/assertions.rb:33:in `assert_nothing_raised'
-          # - rails_6.1
+          - rails_6.1
         exclude:
         - gemfile: rails_4.2
           ruby: 2.7
         - gemfile: rails_4.2
           ruby: 3.0