What's Changed
* Fix epsilon relative stopping criteria by [fabinsch](https://github.com/fabinsch) ([#58](https://github.com/Simple-Robotics/proxsuite/pull/58))
* Handle empty inputs by [fabinsch](https://github.com/fabinsch) ([#59](https://github.com/Simple-Robotics/proxsuite/pull/59))
* Fix calculation of objection function value by [fabinsch](https://github.com/fabinsch) ([#60](https://github.com/Simple-Robotics/proxsuite/pull/60))
* Doc: matio link by [fabinsch](https://github.com/fabinsch) ([#61](https://github.com/Simple-Robotics/proxsuite/pull/61))
* Fix packaging issue by [jcarpent](https://github.com/jcarpent) ([#64](https://github.com/Simple-Robotics/proxsuite/pull/64))
* Change default model upper and lower bounds by [Bambade](https://github.com/Bambade) ([#66](https://github.com/Simple-Robotics/proxsuite/pull/66))
* Fix API for bounds on the inequality constraints by [jcarpent](https://github.com/jcarpent) ([#67](https://github.com/Simple-Robotics/proxsuite/pull/67))