Fix contact property accessors

lib/hubspot/contact.rb

@@ -106,6 +106,14 @@ def batch_update(contacts, opts = {})
     end
   end
 
+  def [](name)
+    return @changes[name] if changes.key? name
+
+    name_property = @properties[name]
+
+    name_property.is_a?(Hash) ? name_property['value'] : name_property
+  end
+
   def name
     [firstname, lastname].compact.join(' ')
   end

lib/hubspot/resource.rb

@@ -230,11 +230,11 @@ def add_accessors(keys)
       singleton_class.instance_eval do
         keys.each do |k|
           # Define a getter
-          define_method(k) { @changes[k.to_sym] || @properties.dig(k, 'value') }
+          define_method(k) { self[k] }
 
           # Define a setter
           define_method("#{k}=") do |v|
-            @changes[k.to_sym] = v
+            @changes[k] = v
           end
         end
       end
@@ -247,9 +247,9 @@ def method_missing(method_name, *arguments, &block)
         add_accessors([attr])
 
         # Call the new setter
-        return send(method_name, arguments[0])
+        send(method_name, arguments[0])
       elsif @properties.key?(method_name)
-        return @properties[method_name]['value']
+        self[method_name]
       else
         super
       end