Update playground code and ensure rails 6 and 7 works

Author: brunoocasali

Gemfile

@@ -13,14 +13,19 @@ group :development do
 end
 
 group :test do
-  rails_version = ENV['RAILS_VERSION'] || '6.1'
+  rails_version = ENV['RAILS_VERSION'] || '7.1'
   sequel_version = ENV['SEQUEL_VERSION'] ? "~> #{ENV['SEQUEL_VERSION']}" : '>= 4.0'
 
   gem 'active_model_serializers'
   gem 'rails', "~> #{rails_version}"
   gem 'sequel', sequel_version
 
-  gem 'sqlite3', '~> 2', platform: %i[rbx ruby]
+  # remove when deprecate rails 6
+  if Gem::Version.new(rails_version) >= Gem::Version.new('7.0')
+    gem 'sqlite3', '~> 2', platform: %i[rbx ruby]
+  else
+    gem 'sqlite3', '< 2', platform: %i[rbx ruby]
+  end
 
   gem 'activerecord-jdbc-adapter', platform: :jruby
   gem 'activerecord-jdbcsqlite3-adapter', platform: :jruby
@@ -29,6 +34,7 @@ group :test do
   gem 'simplecov', require: 'false'
   gem 'simplecov-cobertura', require: 'false'
   gem 'threads'
+  gem 'logger'
 
   gem 'byebug'
   gem 'dotenv', '~> 2.7', '>= 2.7.6'

playground/Gemfile

@@ -4,9 +4,9 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
 gem 'rails', '~> 6.1.3'
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.4'
+gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 gem 'bootstrap', '~> 5.0.0.beta2'