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

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.7.7-bullseye AS base
+FROM ruby:3.2.1-bullseye AS base
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN apt-get update \
@@ -31,7 +31,7 @@ RUN mkdir -p /opt/postal/app /opt/postal/config
 WORKDIR /opt/postal/app
 
 # Install bundler
-RUN gem install bundler -v 2.4.7 --no-doc
+RUN gem install bundler -v 2.4.9 --no-doc
 
 # Install the latest and active gem dependencies and re-run
 # the appropriate commands to handle installs.