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

app/models/organization.rb

@@ -31,7 +31,7 @@ class Organization < ApplicationRecord
   include HasSoftDestroy
 
   validates :name, presence: true
-  validates :permalink, presence: true, format: { with: /\A[a-z0-9-]*\z/ }, uniqueness: true, exclusion: { in: RESERVED_PERMALINKS }
+  validates :permalink, presence: true, format: { with: /\A[a-z0-9-]*\z/ }, uniqueness: { case_sensitive: false }, exclusion: { in: RESERVED_PERMALINKS }
   validates :time_zone, presence: true
 
   default_value :time_zone, -> { "UTC" }