Release v2.4.0 (#262)

Release v2.3.0 (#236)

Update SB3 version (#217)

Release v2.1.0 (#204)

* Release v2.1.0

* Fix mypy

* Fix warnings in tests

Prepare Release v2.0 (#192)

Release v1.8.0 (#173)

Release v1.7.0 (#134)

Add progress bar argument (#107)

* Add progress bar argument

* Sort imports

Release v1.6.1 (#104)

Release v1.6.0 and bug fix for TRPO (#84)