Maintenance: Bump rubocop-rspec from 2.6.0 to 2.7.0

Bumps [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) from 2.6.0 to 2.7.0.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-rspec/compare/v2.6.0...v2.7.0)

Gemfile.lock

@@ -527,7 +527,7 @@ GEM
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.7.0, < 2.0)
-    rubocop-rspec (2.6.0)
+    rubocop-rspec (2.7.0)
       rubocop (~> 1.19)
     ruby-progressbar (1.11.0)
     ruby-saml (1.13.0)

spec/models/channel/driver/sms/message_bird_spec.rb

@@ -28,7 +28,7 @@ RSpec.describe Channel::Driver::Sms::MessageBird do
   private
 
   def create_channel
-    FactoryBot.create(:channel,
+    create(:channel,
            options:       {
              adapter: 'sms/message_bird',
              sender:  sender_number,

spec/models/channel/driver/sms/twilio_spec.rb

@@ -28,7 +28,7 @@ RSpec.describe Channel::Driver::Sms::Twilio do
   private
 
   def create_channel
-    FactoryBot.create(:channel,
+    create(:channel,
            options:       {
              account_id: account_id,
              adapter:    'sms/twilio',