Citylearn

What's Changed
* updated convenience properties by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/82


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.1b5...v2.1b6

What's Changed
* Citylearn challenge 2023 power outage env by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/81


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.1b4...v2.1b5

What's Changed
* added limit estimates for power outage observation by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/80


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.1b3...v2.1b4

What's Changed
* removed negative kpi assertion by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/79


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.1b2...v2.1b3

What's Changed
* included negative evaluation value error checking by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/78


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.1b1...v2.1b2

What's Changed
* Citylearn challenge 2023 power outage env by kingsleynweye in https://github.com/intelligent-environments-lab/CityLearn/pull/77


**Full Changelog**: https://github.com/intelligent-environments-lab/CityLearn/compare/v2.0.0...v2.1b1