Release 1.4.0 (DLR-RM#729)

* Release 1.4.0

* Add integration section in the readme

Release 1.3.0 (DLR-RM#625)

Hotfix for Vecnormalize (DLR-RM#558)

* Hotfix for Vecnormalize

* Rename `ret` to `returns`

Release v1.1.0 (DLR-RM#497)

Stable-Baselines3 v1.0 (DLR-RM#354)

* Bump version and update doc

* Fix name

* Apply suggestions from code review

Co-authored-by: Adam Gleave <[email protected]>

* Update docs/index.rst

Co-authored-by: Adam Gleave <[email protected]>

* Update wording for RL zoo

Co-authored-by: Adam Gleave <[email protected]>

Add custom objects support + bug fix (DLR-RM#336)

* Add support for custom objects

* Add python 3.8 to the CI

* Bump version

* PyType fixes

* [ci skip] Fix typo

* Add note about slow-down + fix typos

* Minor edits to the doc

* Bug fix for DQN

* Update test

* Add test for custom objects

Beta is over =)! V1.0rc0 (DLR-RM#334)

* Fix doc + bump version

* Removed cmd util

* Remove test

Fix `train_freq` at load time (DLR-RM#332)

* Fix train_freq loading

* Update docker

* Add sanity checks + tests for train freq

HER and bug fixes

Bug fixes, improved docs