Changelog
* Fix docstring whitespace 62e58bd95325604186563f54c898736db9d39585
* Added optional default_resolver in `ObjectType` 98825fa4bc0f2fd6f88d11796b1093e0d63a51ee
* Fix `ObjectType` inheritance with custom Meta ad251e9a8dd46d212e39da67945df4fc3e02b361 48efec307ce245bfe692f75b5dc07c14d8bce15b
* Fixed circular Union/Interfaces d4d8a76a0936b8b8b90e6b316003c31c21e30500
* Improved `lazy_import` to accept also dotted attributes d594a0eca86102ce2ebf9633018437eef8997f42
* Use `Promise.resolve` instead of `promisify` (so we adapt to Promise 2.0) bd0d418986cf69b51801f8e4d361c0c9a5dbc17c
* Improved lazy types support in `Field`, `InputField`, `List` and `NonNull` accepting also now string attributes (will be treated as imports, like: `Field("graphene.String")` 4b714659225a93ea44e95ccdd9ad1b5ea9e36c05
Docs
* Added Sphinx to requirements in docs e405a20e3dad7862ae315077150f23b63293a8ea
* Fix indent in mutation docs 3a198d052acc01a8469dc03d0c0d798612830be2
* Spelling/Grammar fix in docs 313a0041414c729fba8c2270359628b1251ce960
* Fixed typo in link to graphql.org d86bbd8a8647bbcf9d668968977cc35c64f67f12