chore: Upgrade rails and ruby versions (#2400)

ruby version: 3.0.2
rails version: 6.1.4

app/models/channel/facebook_page.rb

@@ -47,14 +47,14 @@ class Channel::FacebookPage < ApplicationRecord
       ]
     )
   rescue => e
-    Rails.logger.debug "Rescued: #{e.inspect}"
+    Rails.logger.debug { "Rescued: #{e.inspect}" }
     true
   end
 
   def unsubscribe
     Facebook::Messenger::Subscriptions.unsubscribe(access_token: page_access_token)
   rescue => e
-    Rails.logger.debug "Rescued: #{e.inspect}"
+    Rails.logger.debug { "Rescued: #{e.inspect}" }
     true
   end
 end

app/models/concerns/content_attribute_validator.rb

@@ -31,7 +31,7 @@ class ContentAttributeValidator < ActiveModel::Validator
   end
 
   def validate_item_attributes!(record, valid_keys)
-    item_keys = record.items.collect(&:keys).flatten.map(&:to_sym).compact
+    item_keys = record.items.collect(&:keys).flatten.filter_map(&:to_sym)
     invalid_keys = item_keys - valid_keys
     record.errors.add(:content_attributes, "contains invalid keys for items : #{invalid_keys}") if invalid_keys.present?
   end

app/models/integrations/app.rb

@@ -38,8 +38,6 @@ class Integrations::App
     case params[:id]
     when 'slack'
       ENV['SLACK_CLIENT_SECRET'].present?
-    when 'dialogflow', 'fullcontact'
-      true
     else
       true
     end

app/models/message.rb

@@ -105,7 +105,7 @@ class Message < ApplicationRecord
 
   def merge_sender_attributes(data)
     data.merge!(sender: sender.push_event_data) if sender && !sender.is_a?(AgentBot)
-    data.merge!(sender: sender.push_event_data(inbox)) if sender&.is_a?(AgentBot)
+    data.merge!(sender: sender.push_event_data(inbox)) if sender.is_a?(AgentBot)
     data
   end
 
@@ -142,7 +142,7 @@ class Message < ApplicationRecord
   end
 
   def update_contact_activity
-    sender.update(last_activity_at: DateTime.now) if sender&.is_a?(Contact)
+    sender.update(last_activity_at: DateTime.now) if sender.is_a?(Contact)
   end
 
   def dispatch_create_events