Adds ability to exclude widget from the script tag

lib/intercom-rails/config.rb

@@ -103,7 +103,7 @@ def self.reset!
     config_group :inbox do
       config_accessor :counter # Keep this for backwards compatibility
       config_accessor :style do |value|
-        raise ArgumentError, "inbox.style must be one of :default or :custom" unless [:default, :custom].include?(value)
+        raise ArgumentError, "inbox.style must be one of :default, :custom, :none or false" unless [:default, :custom, :none, false].include?(value)
       end
     end
 

lib/intercom-rails/script_tag.rb

@@ -100,6 +100,8 @@ def widget_options_from_config
         '#IntercomDefaultWidget'
       when :custom
         '#Intercom'
+      when :none, false
+        nil
       else
         nil
       end

spec/script_tag_spec.rb

@@ -100,6 +100,14 @@ def sha256_hmac(secret, input)
       IntercomRails.config.inbox.style = :custom
       expect(ScriptTag.new.intercom_settings['widget']).to eq({'activator' => '#Intercom'})
     end
+    it 'knows about :none' do
+      IntercomRails.config.inbox.style = :none
+      expect(ScriptTag.new.intercom_settings['widget']).to eq(nil)
+    end
+    it 'knows about false' do
+      IntercomRails.config.inbox.style = false
+      expect(ScriptTag.new.intercom_settings['widget']).to eq(nil)
+    end
   end
 
   context 'company' do