README.md in usable-2.1.2 vs README.md in usable-2.1.3

@@ -111,9 +111,14 @@
 
 ```ruby
 gem 'usable'
 ```
 
+## TODO
+
+* Support blocks for config values (e.g. `config.user { User.first }`)
+
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).