chore: Upgrade to Ruby 3.2.1 & Rails 6.0

* chore: upgrade to rails 6.0

* chore: upgrade ruby to 3.2.1

* chore: upgrade bundler

* chore: upgrade execjs

* chore: upgrade to rails 6.1

* chore: switch to sentry-ruby from raven

* chore: add extra platforms to gemfile

config/application.rb

@@ -15,6 +15,8 @@ Bundler.require(*Rails.groups)
 module Postal
   class Application < Rails::Application
 
+    config.load_defaults 6.0
+
     # Disable most generators
     config.generators do |g|
       g.orm             :active_record
@@ -36,5 +38,7 @@ module Postal
 
     config.logger = Postal.logger_for(:rails)
 
+    config.hosts << Postal.config.web.host
+
   end
 end