See if we can't expand compatibility again

Appraisals

@@ -1,21 +1,35 @@
 # frozen_string_literal: true
 
-appraise 'rails-5-sqlite3' do
+appraise 'rails_4_2_sqlite3' do
+  gem 'rails', '4.2.11.3'
+  gem 'sqlite3', '~> 1.3.6'
+end
+
+appraise 'rails_5_2_sqlite3' do
   gem 'rails', '5.2.4.4'
-  gem 'sqlite3'
+  gem 'sqlite3', '~> 1.3.6'
+end
+
+if Gem::Requirement.new('>= 2.5.0').satisfied_by?(Gem::Version.new(RUBY_VERSION))
+  appraise 'rails_6_0_sqlite3' do
+    gem 'rails', '6.0.3.4'
+    gem 'sqlite3', '~> 1.4'
+  end
 end
 
-appraise 'rails-6-sqlite3' do
-  gem 'rails', '6.0.3.4'
-  gem 'sqlite3'
+appraise 'rails_4_2_mongodb' do
+  gem 'rails', '4.2.11.3'
+  gem 'mongoid', '5.4'
 end
 
-appraise 'rails-5-mongodb' do
+appraise 'rails_5_2_mongodb' do
   gem 'rails', '5.2.4.4'
   gem 'mongoid', '6.4'
 end
 
-appraise 'rails-6-mongodb' do
-  gem 'rails', '6.0.3.4'
-  gem 'mongoid', '7.2'
+if Gem::Requirement.new('>= 2.5.0').satisfied_by?(Gem::Version.new(RUBY_VERSION))
+  appraise 'rails_6_0_mongodb' do
+    gem 'rails', '6.0.3.4'
+    gem 'mongoid', '7.2'
+  end
 end

bin/setup

@@ -6,8 +6,11 @@ set -e
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
 echo "Installing dependencies"
-gem install bundler --conservative
-bundle check || bundle install
+gem update --system --force --no-document
+gem uninstall -v '>= 2' bundler || true
+gem install bundler -v '< 2' --no-document
+
+bundle check || bundle install --jobs=3 --retry=3
 
 bundle exec appraisal install
 

devise_2fa.gemspec

@@ -18,7 +18,9 @@ Gem::Specification.new do |gem|
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ['lib']
 
-  gem.add_dependency "rails", ">= 4.1", "< 6.1"
+  gem.required_ruby_version = '>= 2.4.0'
+
+  gem.add_dependency 'rails', '>= 4.1', '< 6.1'
 
   gem.add_runtime_dependency 'devise', '~> 4.6'
   gem.add_runtime_dependency 'rotp', '~> 5.1'