Require Rails 6+ and Ruby 2.7+ (#15)

Avoid monkey patching `Array#intersection` and hacks in action cable javascript loading

.github/workflows/test.yml

@@ -16,21 +16,16 @@ jobs:
       matrix:
         include:
           ### TEST RUBY VERSIONS
-          - ruby: "2.5"
-          - ruby: "2.6"
           - ruby: "2.7"
           - ruby: "3.0"
           - ruby: "3.1"
           - ruby: "3.2"
           - ruby: "3.3"
           ### TEST RAILS VERSIONS
-          - ruby: "2.6"
-            env:
-              RAILS_VERSION: "5.2"
-          - ruby: "2.6"
+          - ruby: "2.7"
             env:
               RAILS_VERSION: "6.0"
-          - ruby: "2.6"
+          - ruby: "2.7"
             env:
               RAILS_VERSION: "6.1"
           - ruby: "3.3"

app/views/pairer/boards/_action_cable_script.html.erb

@@ -1,11 +1,5 @@
-<% if Rails::VERSION::MAJOR == 5 %>
-  <script src="https://cdn.jsdelivr.net/npm/actioncable@<%= Rails::VERSION::STRING.split(".")[0..2].join(".") %>/lib/assets/compiled/action_cable.min.js"></script>
-<% end %>
-
 <script type="module">
-  <% if Rails::VERSION::MAJOR >= 6 %>
-    import * as ActionCable from "https://cdn.jsdelivr.net/npm/@rails/actioncable@<%= Rails::VERSION::STRING.split(".")[0..2].join(".") %>/+esm";
-  <% end %>
+  import * as ActionCable from "https://cdn.jsdelivr.net/npm/@rails/actioncable@<%= Rails::VERSION::STRING.split(".")[0..2].join(".") %>/+esm";
 
   var consumer = ActionCable.createConsumer();
 

lib/pairer.rb

@@ -14,11 +14,3 @@ def self.config(&block)
   end
 
 end
-
-if RUBY_VERSION.to_f <= 2.6 && !Array.new.respond_to?(:intersection)
-  Array.class_eval do
-    def intersection(other)
-      self & other
-    end
-  end
-end

pairer.gemspec

@@ -16,7 +16,9 @@ Gem::Specification.new do |spec|
 
   spec.files = Dir["{app,config,db,lib,public}/**/*", "LICENSE", "Rakefile", "README.md"]
 
-  spec.add_dependency "rails", ">= 5.0"
+  spec.required_ruby_version = ">= 2.7"
+
+  spec.add_dependency "rails", ">= 6.0"
   spec.add_dependency "actioncable"
   spec.add_dependency "slim"
   spec.add_dependency "hashids"