Change CI workflow to exclude Rails 5.x from testing on Ruby 3

Add page scope to resolve conflict between RSpec and Capybara

Add Ruby 3 and coverage reporting to CI worflow

Change to test against released Rails 6.1 version

Change spec helper to remove Ruby restriction and use double-quoted strings

Change gemfiles to drop sqlite3 dependency

Add release note

Change to use CI flag to trigger coverage test

Add tzinfo gem to rails 3.2 gemfile

Change to remove rails and bundler as dev dependencies

Change appraisal gemfiles to only use railties

Change rails test app to load only action_controller and action_view

Change tests to use double-quoted strings

Add docs on how to use breadcrumb_trail to collect breadcrumb names in ref to #42

Change to fix breadcrumb trail enumerator to accept configuration options