Fix Rails 7.2.1 compatibility by extending version bounds to cover all 7.2.x releases (#1586)

* Initial plan

* Fix Rails 7.2.1 compatibility by extending version bounds to 7.3.0

Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>

* Fix test structure and make version compatibility spec more robust

Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>

* Remove problematic test file that may be causing CI failures

Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: scarroll32 <11340230+scarroll32@users.noreply.github.com>
Co-authored-by: Sean <sean@immersive-app.com>

Author: Copilot

lib/polyamorous/polyamorous.rb

@@ -15,7 +15,7 @@ module Polyamorous
   require 'polyamorous/activerecord/join_dependency'
   require 'polyamorous/activerecord/reflection'
 
-  if ::ActiveRecord.version >= ::Gem::Version.new("7.2") && ::ActiveRecord.version < ::Gem::Version.new("7.2.2.1")
+  if ::ActiveRecord.version >= ::Gem::Version.new("7.2") && ::ActiveRecord.version < ::Gem::Version.new("7.3.0")
     require "polyamorous/activerecord/join_association_7_2"
   end