Configure Rails annotations via environment config (Rails 6+)

[orien]

Summary

Fix rails notes support by adding config to config/environments/development.rb and config/environments/test.rb for Rails 6+ projects..

Context

As per #510, the config generated via rails generate cucumber:install does not support rails notes for Rails 6+.

By changing the annotate feature to exercise rails notes rather than rake notes the problem is exposed.

Change

Update the install generator so when rails generate cucumber:install is run the existing Rake-based annotation configuration is only generated for projects running versions of Rails pre v6.0. When running Rails v6.0 or greater, add configuration to the Rails development and test environment configuration files.

How Has This Been Tested?

This is covered in both RSpec and Cucumber tests.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue).
• [ ] New feature (non-breaking change which adds functionality).
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist

• [x] I've added tests for my code.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.

[luke-hill]

This explains a lot (I was getting the rake notes test failing locally!)